Abiotic factors that affect population growth and demographics in organisms are referred to as B. density-independent factors.
What are the abiotic factors that can affect population growth?
Population growth and demographics are heavily influenced by the density of organisms within a given area. Density-dependent factors include biotic factors such as competition for resources, predation, and disease, which become more influential as the population density increases.
In contrast, density-independent factors such as natural disasters and climate change affect populations regardless of their density. These factors include environmental elements such as temperature, natural disasters, and availability of resources. They can affect population growth and density regardless of the number of organisms in the area.
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what is the Scleral spur, Canal of Schlemm (scleral venous sinus)?
The scleral spur is a small, triangular, bony protuberance located in the anterior chamber of the eye, near the junction between the cornea and the sclera.
It serves as an attachment point for the ciliary muscle, which helps to control the shape of the lens and focus the eye.
The canal of Schlemm, also known as the scleral venous sinus, is a circular channel located in the periphery of the anterior chamber, near the scleral spur.
It is responsible for draining aqueous humor, a clear fluid that fills the front of the eye and maintains intraocular pressure, out of the eye and into the bloodstream.
The canal of Schlemm is lined with specialized cells called trabecular meshwork cells, which regulate the flow of aqueous humor out of the eye.
Obstruction of the canal of Schlemm can lead to an increase in intraocular pressure, which can cause damage to the optic nerve and potentially lead to vision loss, as in the case of glaucoma.
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do the nodal lines get farther apart, get closer together, or remain unchanged?
Nodal lines can get closer together or farther apart depending on changes in the frequency of the wave, while they remain unchanged if the frequency remains constant.
To determine whether nodal lines get farther apart, closer together, or remain unchanged, we need to consider the context in which they appear, such as in a wave pattern or a standing wave.
Nodal lines are points or lines where the amplitude of a wave is zero. In a standing wave, nodal lines occur at fixed positions and are separated by regions of maximum amplitude called antinodes.
In general, as the frequency of a wave increases, the number of nodal lines will also increase, resulting in nodal lines appearing closer together.
Conversely, as the frequency decreases, the number of nodal lines will decrease, and they will appear farther apart. However, if the frequency remains constant, the nodal lines will also remain unchanged in their positions.
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Why will goggles allow a swimmer under water to focus more clearly on what he or she is looking at?
Goggles enable a swimmer to focus more clearly underwater due to several factors, including refraction, maintaining a layer of air, and protection from irritants.
When light travels from one medium to another, like from water to air, it changes speed, causing the light to bend, a phenomenon known as refraction. This bending of light distorts the images our eyes perceive underwater. Goggles have a layer of air between the swimmer's eyes and the water, maintaining the familiar air-to-eye interface, and reducing the amount of refraction. This allows the eyes to focus more effectively and improves underwater vision.
Additionally, goggles create a barrier that separates the eyes from the water, keeping irritants like chlorine and salt from causing discomfort. This barrier enables the swimmer to keep their eyes open longer and focus more clearly without the distraction of irritated eyes. Lastly, goggles often come with anti-fog coatings or ventilation features that prevent condensation from forming on the lens. This helps to maintain a clear view and eliminates the need to constantly surface to wipe the lenses.
In summary, goggles improve a swimmer's underwater vision by minimizing refraction, protecting the eyes from irritants, and preventing fogging. These factors combined enable the swimmer to focus more clearly and have a more enjoyable swimming experience.
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QUESTIONS Which of the following is a true statement about the % Daily Values (%DV) found on the Nutrition Facts panel of food labels? a.The FDA considers a food with 5% DV or higher to be high in that nutrient b.They are a precise guide for assessing an individual's nutrient needs. c.They can be useful for making product comparisons and quick judgements about a food. d.DV is not a useful indicator that should be used in choosing what to eat.
The correct statement about the % Daily Values (%DV) found on the Nutrition Facts panel of food labels is c. They can be useful for making product comparisons and quick judgments about food. While %DV can provide a general idea of the nutrient content in a food, it is not a precise guide for assessing an individual's nutrient needs, as everyone's needs vary based on factors like age, gender, and activity level. The correct answer is option c.
The %DV is a general guide to help consumers quickly compare the nutrient content of different foods and make informed choices about their diet. The %DV is based on a 2,000-calorie-per-day diet, so individual nutrient needs may vary depending on factors such as age, sex, and physical activity level. Therefore, the %DV is not a precise guide for assessing an individual's nutrient needs.
The FDA does not consider food with 5% DV or higher to be high in that nutrient; instead, it recommends that consumers choose foods that have a higher %DV for nutrients they want to get more of and less %DV for nutrients they want to limit.
So, option c is the correct statement about % Daily Values (%DV).
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why is it that a bell in a sealed bell jar can't be heard when a vacuum is created
A bell in a sealed bell jar can't be heard when a vacuum is created is because sound requires a medium, such as air, to travel through.
In a vacuum, there is no medium for the sound waves to propagate through, so the sound cannot be heard.
An explanation for this is that sound waves are essentially pressure waves, where vibrations in the medium (such as air molecules) create regions of high and low pressure that travel through the medium. In a vacuum, there are no molecules present to create these pressure waves, so sound cannot be transmitted.
the lack of a medium for sound waves to propagate through is the reason why a bell in a sealed bell jar cannot be heard when a vacuum is created.
Sound is a form of mechanical wave that travels through the vibration of particles in a medium, such as air, water, or solid materials. In a vacuum, there are no particles present for the vibrations to move through. When a bell is struck inside a sealed bell jar with a vacuum, the vibrations from the bell cannot be transmitted to the surrounding air particles, as there are none. As a result, the sound waves do not reach our ears, and we cannot hear the bell.
The absence of a medium in a vacuum prevents sound waves from transmitting, which is why we cannot hear a bell in a sealed bell jar when a vacuum is created.
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What are biological reactions often coupled to in order to make themselves more favorable? A) ATP hydrolysisB) ATP synthesis C) ADP hydrolysis
Biological reactions are often coupled to ATP hydrolysis (A) in order to make themselves more favorable.
Which reactions are coupled to make them more favorable?
Biological reactions are often coupled to ATP hydrolysis in order to make themselves more favorable. This process involves the breakdown of ATP (adenosine triphosphate) into ADP (adenosine diphosphate) and a free inorganic phosphate group, releasing energy that can be utilized in cellular metabolism to drive other less favorable reactions forward. This is because ATP is a high-energy molecule that can be easily broken down to release energy for cellular metabolism. By coupling biological reactions to ATP hydrolysis, the energy released from ATP can be used to drive other cellular processes, making the overall reaction more favorable.
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The two systems of the motor portion of the autonomic nervous system exert {{c1::antagonistic}} control over one another
The two systems of the motor portion of the autonomic nervous system exert antagonistic control over one another.
The sympathetic and parasympathetic systems work together to maintain homeostasis in the body. The sympathetic system is responsible for the "fight or flight" response, while the parasympathetic system is responsible for the "rest and digest" response.
The two systems have opposite effects on various organs and systems in the body. For example, the sympathetic system increases heart rate and respiratory rate, while the parasympathetic system slows them down. Similarly, the sympathetic system causes the release of glucose from the liver, while the parasympathetic system promotes energy conservation and storage.
The balance between the two systems is crucial for the body to function properly. Imbalances can lead to various health conditions such as hypertension, digestive disorders, and respiratory disorders. Thus, understanding the interaction and interdependence of these two systems is important for maintaining optimal health.
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how much fluid from the 1:5 dilution has to be transferred to the second microcentrifuge tube containing 900 buffer to
To achieve a 1:5 dilution in the second microcentrifuge tube containing 900 µL of buffer, you need to transfer 225 µL of fluid from the 1:5 dilution.
1. A 1:5 dilution means that there is 1 part of the fluid mixed with 5 parts of the buffer. Therefore, the total parts in the mixture are 1 + 5 = 6 parts.
2. You need to find out how much fluid should be mixed with the 900 µL of buffer in the second tube.
To do this, divide the 900 µL of buffer by 5 (since there are 5 parts of buffer), which is 900 µL / 5 = 180 µL. This gives you the volume of 1 part.
3. Now, multiply this volume by the number of parts of the fluid (1 part) to find the volume of fluid needed: 180 µL x 1 = 180 µL.
4. Since you are working with a 1:5 dilution, you need to transfer 180 µL of fluid from the 1:5 dilution to the second microcentrifuge tube containing 900 µL of buffer.
Hence, To achieve a 1:5 dilution in the second microcentrifuge tube containing 900 µL of buffer, transfer 180 µL of fluid from the 1:5 dilution.
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describe how dna polymerase builds new strands of dna. include: idea of templates, importance of complementary base pairing.
Answer:
- First, the DNA double helix must be unwound and separated by an enzyme called helicase, creating two separate strands of DNA. These single strands serve as templates for the new DNA strands that will be built.
- DNA polymerase then begins building new DNA strands by adding nucleotides to the template strands. The nucleotides contain a sugar molecule, a phosphate group, and a nitrogenous base, which can be adenine (A), thymine (T), cytosine (C), or guanine (G).
- Importantly, DNA polymerase can only add nucleotides to the new strand in the 5' to 3' direction, meaning that nucleotides are added to the 3' end of the strand. This is because the phosphate group at the 5' end of the nucleotide must bond with the hydroxyl (OH) group at the 3' end of the previous nucleotide in the strand.
- The process of adding nucleotides to the new strand requires complementary base pairing, where each nucleotide added must pair with a nucleotide on the template strand. Adenine pairs with thymine (A-T) and cytosine pairs with guanine (C-G).
- As DNA polymerase adds new nucleotides to the new strand, it proofreads its work to ensure that the correct nucleotides are added and that any mistakes are corrected. This process of proofreading helps to maintain the accuracy of DNA replication.
classify each of the following organic nutrients based on the descriptions provided. answers may be used more than once.Energy storage molecule found in roots and seeds of plants Quickly accessed energy source Help protect vital organs Stored in fatty tissue; used for long-term energy storage Hydrophilic Insulation Hydrophobic Not a source of energy in organisms' diet Supplies organisms with energy if carbohydrates and fat are not available Wide range of functions: enzymes and signaling molecules Energy storage molecule found in muscles and the liver of animals Storage and processing of genetic information
Classification of the organic nutrients based on the descriptions are Storage and processing of genetic information: This is specifically referring to nucleic acids, specifically DNA and RNA.
Describe the organic nutrients based on the descriptions.
Storage and processing of genetic information: This is specifically referring to nucleic acids, specifically DNA and RNA, which store and process genetic information.
1. Energy storage molecule found in roots and seeds of plants: Starch
2. Quickly accessed energy source: Glucose (a carbohydrate)
3. Help protect vital organs: Lipids (fats)
4. Stored in fatty tissue; used for long-term energy storage: Triglycerides (a type of lipid)
5. Hydrophilic: Carbohydrates (e.g., glucose)
6. Insulation: Lipids (fats)
7. Hydrophobic: Lipids (fats)
8. Not a source of energy in organisms' diet: Nucleic acids (e.g., DNA and RNA)
9. Supplies organisms with energy if carbohydrates and fat are not available: Proteins
10. Wide range of functions: enzymes and signaling molecules: Proteins
11. Energy storage molecule found in muscles and the liver of animals: Glycogen (a carbohydrate)
12. Storage and processing of genetic information: Nucleic acids (e.g., DNA and RNA)
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What are sections of DNA that are capable of moving to different locations on a chromosome called?
Sections of DNA that are capable of moving to different locations on a chromosome are called transposable elements or transposons.
They are sometimes referred to as "jumping genes" because they can move from one location to another within a genome or chromosome.
Transposable elements were first discovered in maize by Barbara McClintock in the 1940s, and they have since been found in many other organisms, including humans.
Transposable DNA can have a variety of effects on the genome. They may disrupt gene function by inserting themselves into coding regions of genes, or they may regulate gene expression by inserting into regulatory regions.
They can also promote genetic diversity by creating new combinations of genes or by causing mutations that can be beneficial or harmful to an organism.
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What is the third source of ATP during contraction?
The third source of ATP during contraction is called the phosphagen system. This system is a short-term energy source that uses the high energy phosphate compound, creatine phosphate (CP).
CP is produced from the breakdown of ATP and is stored in the muscle cell. When the muscle contracts, the CP will be broken down to create ADP and phosphate, which will then be used to produce more ATP. This process is very rapid and allows for short bursts of energy.
The phosphagen system is anaerobic, meaning it does not require oxygen to occur, and can provide enough energy for about 10 seconds of maximal muscle contraction. It is an important energy source for high-intensity activities such as sprinting and weightlifting.
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the lateral meristems in woody plants provide for secondary growth, increasing the thickness of roots and shoots. which of the following models correctly demonstrates the process of secondary growth? assume the center of the root or shoot is to the left, and the outer surface is on the right.
The lateral meristems in woody plants provide for secondary growth, increasing the thickness of roots and shoots through the vascular cambium and cork cambium models.
The process of secondary growth involves two lateral meristems: vascular cambium and cork cambium.
Vascular cambium is a thin layer of cells found between the xylem and phloem in stems and roots, and it is responsible for producing secondary xylem (wood) towards the inside and secondary phloem (bark) towards the outside. As the vascular cambium continuously generates these tissues, the thickness of roots and shoots increases.
Cork cambium, another lateral meristem, is located in the outer bark and generates cork cells. These cells replace the epidermis in woody plants, providing protection and insulation. As the plant grows and its girth increases, cork cambium produces more cork cells to keep up with the plant's expansion.
In summary, secondary growth in woody plants is demonstrated by the combined action of vascular cambium (producing secondary xylem and phloem) and cork cambium (producing cork cells).
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Some veins have smooth muscle and are controlled primarily __________.a. Via parasympathetic innervation at alpha-adrenergic receptors b. Via sympathetic innervation at beta-adrenergic receptors c. Via sympathetic innervation at alpha-adrenergic receptors
Some veins have smooth muscle and are primarily controlled via sympathetic innervation at alpha-adrenergic receptors.
These receptors are located on the smooth muscle cells of the veins and respond to the release of the neurotransmitter norepinephrine by sympathetic nerve fibers. When norepinephrine binds to the alpha-adrenergic receptors, it causes the smooth muscle to contract, resulting in vasoconstriction. This helps to increase venous return to the heart, which is important for maintaining blood pressure and cardiac output.
However, other factors such as hormones and local factors like temperature, pH, and oxygen levels can also affect vein smooth muscle tone. Therefore, the control of venous tone is a complex process involving multiple factors, with sympathetic innervation playing a significant role.
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The building blocks for peptides are ______. A. nucleic and amino acids. B. maltose. C. glucose. D. nucleic acids. E. amino acids.
E. amino acids. The building blocks for peptides are amino acids. Peptides are composed of chains of amino acids linked together by peptide bonds. These amino acids serve as the fundamental units that make up peptides,
which are essential molecules for various biological processes, including protein synthesis, cell signaling, and enzyme activity. Amino acids are organic compounds that contain an amino group (-NH2), a carboxyl group (-COOH), and a side chain (R group), and they are the monomers that make up proteins and peptides. Nucleic acids, maltose, glucose,Peptides are composed of chains of amino acids linked together by peptide bonds. and nucleic acids are not directly involved in the formation of peptides.
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Plant cells have _____________. It is used for photosynthesis.
Question 1 options:
nucleus
cytoplasm
cell membrane
chloroplast
Answer: chloroplast
Explanation: Photosynthesis occurs inside the chloroplast of plants.
How do bees help plants in reproduction?
A.
They transfer pollen from one flower to another.
B.
They collect nectar from flowers.
C.
They carry flowers to different plants.
D.
They spread the flower’s fragrance to attract other insects.
Answer:
A.
Explanation:
bees fly to flowers so then their legget contacted with the stigma or pollen of the flower.then pollen attach/get stuck to their legs and after that if the bee goes to a feminine flower pollen gets diattached and contact with ovarry of the flower.this cause the flower to turn into a fruit and it's seeds are used for reproducing a new plant
Scientists are examining two different strains of a particular bacteria The length of one strain of the bacteria measures
0.000000462 mm, while the length of the second strain measures 0.0000000898 mm. How much larger is the first strain than the
second?
The first strain can be seen to be five times larger than the second strain.
What is scientific notation?
We have been asked a question that shows that it can be very cumbersome if we try to solve the problem by the use of the numbers as we can see. The best bet that we can use to ensure that the work is a bit easier for us is the use of the scientific notation.
Scientific notation is commonly used in scientific and engineering calculations, where very large or very small numbers are encountered.
Thus to answer the question; How much larger is the first strain than the
second?
4.62 * 10^-7/8.98 * 10^-8
= 5
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Can you help me with this question?
The statement that describes vertebrate species during embryologic development is
They start off very similar but take different developmental paths as they grow; option DWhat are vertebrates?Organisms with an internal backbone, sometimes known as a vertebra, are referred to as vertebrates. They have a robust bone skeleton that anchors muscle and supports the body's tissue. Invertebrates are defined as animals without spines.
Vertebrate species exhibit significant commonalities early in their embryologic development, which is a reflection of their shared heritage.
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What factor primarily determines the type and vertical extent of clouds?
The primary factor that determines the type and vertical extent of clouds is the stability of the atmosphere.
The temperature profile of the atmosphere, which can vary with height, and the presence or lack of moisture both affect how stable the atmosphere is.
When air cools and reaches its dew point, moisture condenses into observable droplets or ice crystals, which leads to the formation of clouds. The stability of the atmosphere and the vertical flow of air are the main determinants of the type and vertical expanse of clouds.
Clouds have a tendency to be flat and spread out horizontally, frequently creating stratus clouds, when the atmosphere is steady, that is, when there is little vertical movement of air. These clouds are frequently low in the vertical extent and can indicate calm weather.
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A virus killed most of the seals in the north sea (e.g., dropped the population from 8000 to 800). in an effort to help preserve the species, scientists caught 20 seals and used them to start a new population in the northwest pacific ocean. what factors would most likely have the least impact in this new population?
The factors that would most likely have the least impact on the new seal population, which was started by relocating 20 seals from the North Sea to the Northwest Pacific Ocean after a virus dropped their population from 8,000 to 800, can be explained as follows:
1. Genetic variation: Since the new population was started with a small number of seals, the genetic variation in the group will be limited. However, this factor is not likely to have a significant impact on their survival, as the initial population of 20 seals can still reproduce and adapt over time.
2. Competition for resources: The relocated seals may face competition for resources like food and territory with other marine species in the Northwest Pacific Ocean. However, the overall impact of this factor is expected to be low, as the seals can adapt to new prey and habitat over time.
3. Climate: The new environment in the Northwest Pacific Ocean might have a different climate compared to the North Sea. However, the seals are known to be resilient and adaptable to various climates, so this factor should have a minimal impact on their survival.
4. Human interference: Although human activities such as pollution and fishing might pose a threat to the new seal population, the impact of these factors can be controlled by implementing conservation measures and regulations.
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How is energy released from fatty acids?
Fatty acids are broken down into molecules of acetyl-CoA in a process called beta oxidation. This reaction releases energy in the form of ATP, which can be used by the body to power cellular processes.
The acetyl-CoA molecules then enter the Krebs cycle, where further energy is released in the form of ATP, as well as carbon dioxide, water and hydrogen ions. The hydrogen ions are then used to produce additional ATP in the electron transport chain.
The breakdown of fatty acids is a process known as lipolysis, and it is an important source of energy for the body, especially during times of low food intake. When fatty acids are broken down, they are broken down into their component parts, including glycerol and free fatty acids. Glycerol is used to produce glucose in the liver, while the free fatty acids are used to generate energy.
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what did Chargaff find that the number of Gs in the DNA equaled to?
Chargaff discovered that in DNA, the number of guanine (G) bases is equal to the number of cytosine (C) bases. This is known as Chargaff's rule and it is essential for the proper pairing of DNA strands during replication.
Chargaff's rules state that in the DNA of any species and any organism, the amount of guanine should be equal to the amount of cytosine and the amount of adenine should be equal to the amount of thymine. Further a 1:1 stoichiometric ratio of purine and pyrimidine bases (i.e., A+G=T+C) should exist. This pattern is found in both strands of the DNA.
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What is the term for a plasmid that codes for antibacterial resistance?
The term for a plasmid that codes for antibacterial resistance is known as a resistance plasmid or R plasmid. These plasmids are common in bacteria and provide them with the ability to resist the effects of antibiotics.
R plasmids carry genes that code for enzymes that can break down antibiotics, efflux pumps that can remove antibiotics from the bacterial cell, or modifications to bacterial cell walls that prevent antibiotics from entering. These genes can be transferred between bacteria through a process called horizontal gene transfer, allowing the spread of antibiotic resistance between different species of bacteria. The emergence of antibiotic-resistant bacteria has become a major public health concern, as it can lead to infections that are difficult or impossible to treat with current antibiotics.
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Cytolytic toxins
A) are extracellular proteins.
B) cause cell lysis and death.
C) damage host cytoplasmic membrane.
D) are extracellular proteins that cause cell lysis and death by damaging the host cytoplasmic membrane.
Cytolytic toxins :
D) are extracellular proteins that cause cell lysis and death by damaging the host cytoplasmic membrane. The correct answer is option D).
Cytolytic toxins are extracellular proteins that cause cell lysis and death by damaging the host cytoplasmic membrane. These toxins are produced by various bacteria and can cause a range of symptoms in the infected host, depending on the type of toxin and the affected tissues. Examples of cytolytic toxins include streptolysin O, which is produced by Streptococcus pyogenes and causes hemolysis of red blood cells, and alpha-toxin, which is produced by Staphylococcus aureus and can cause tissue necrosis and organ damage.
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True or False: Maternal homologous chromosomes are the fathers.
This statement, Maternal homologous chromosomes come from the mother, not the father. Chromosomes are the structures that contain genetic information is false.
Condensed DNA and histone proteins, collectively known as chromatin, are arranged in linear fashion to create chromosomes. For genes with the same corresponding loci, homologous chromosomes are made up of chromosome pairs with characteristics such as length, centromere location, and staining pattern that are almost identical. The organism's father inherits the other homologous chromosome, while the mother inherits one homologous chromosome. After mitosis takes place, the daughter cells have the appropriate number of genes, which are a combination of the genes from the two parents.
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The body can only breakdown ___ glycosidic linkages. a. alpha b. beta c. both alpha and beta d. none of the above
The body can only breakdown alpha glycosidic linkages.
Alpha glycosidic linkages refer to the type of chemical bond that connects monosaccharides (simple sugars) together to form larger carbohydrates such as starch, glycogen, and maltose. The human body produces an enzyme called alpha-amylase which can break down alpha glycosidic linkages in these carbohydrates, allowing the body to use them as a source of energy. However, the body cannot break down beta glycosidic linkages, which are found in certain complex carbohydrates like cellulose, chitin, and some types of dietary fiber. As a result, these beta-linked carbohydrates pass through the digestive system unchanged and are excreted as waste.
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13) Which of the following phases of cell division confirms Mendel's observation of the segregation of alleles in gamete formation?
A) prophase I of meiosis
B) anaphase II of meiosis
C) metaphase I of meiosis
D) anaphase I of meiosis
Anaphase I of meiosis of cell division confirms Mendel's observation of the segregation of alleles in gamete formation. The correct answer is option D.
During anaphase I of meiosis, homologous chromosomes separate and move to opposite poles of the cell, which confirms Mendel's observation of the segregation of alleles in gamete formation. This is because each homologous chromosome contains one of the two alleles for each gene, and the separation ensures that each gamete receives only one allele for each gene.
The other phases of meiosis, such as prophase I and metaphase I, also play important roles in the segregation of alleles and the creation of genetically diverse gametes. However, anaphase I is the specific phase where Mendel's observation is most clearly demonstrated.
Therefore option D is the correct answer.
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Sort the following statements into the appropriate bins according to the classes of enzymes they belong to or describe.
Peptidase is an example of this type of enzyme. Forms two products by hydrolyzing a substrate Dehydrogenase is an example of this type of enzyme. Mutase is an example of this type of enzyme. Catalyzes intramolecular rearrangements, in which functional groups are rearranged within a molecule Catalyzes oxidation and reduction reactions Enzyme Classes Oxidoreductase Isomerase Hydrolase
The statements are sorted into the enzyme classes as Oxidoreductase: Dehydrogenase, oxidation, and reduction reactions, Isomerase: Mutase, intramolecular rearrangements, and Hydrolase: Peptidase, hydrolyzing a substrate.
Oxidoreductases, transferases, hydrolases, lyases, isomerases, ligases, and translocases are the seven categories into which enzymes fall. The categorization is associated with catalyzed reactions.
The statement can be sorted into the following classes:
Oxidoreductase:
- Dehydrogenase is an example of this type of enzyme.
- Catalyzes oxidation and reduction reactions.
Isomerase:
- Mutase is an example of this type of enzyme.
- Catalyzes intramolecular rearrangements, in which functional groups are rearranged within a molecule.
Hydrolase:
- Peptidase is an example of this type of enzyme.
- Forms two products by hydrolyzing a substrate.
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In a human body, most cells that divide do so by mitosis. Only some cells ever undergo meiosis. Which of the following are cells that do not or cannot divide by meiosis? Check all that apply. Somatic cells such as liver cells Germ line cells Haploid (n) cells In the third column of the following table, identify when the following four key events____dergoing meiosis. For comparison, the second column describes when these events occur, if at all, in a cell undergoing mitosis. Event Mitotic Cell
Homologous chromosomes form tetrads. Does not occur
Sister chromatids become separate chromosomes. Anaphase
Homologous chromosomes are pulled to opposite poles. Does not occur
Each chromosome is duplicated into a pair of sister chromatids. S phase
Cells that do not or cannot divide by meiosis include somatic cells (such as liver cells) and haploid (n) cells.
In the human body, most cells divide by mitosis, while only some cells undergo meiosis. Cells that do not or cannot divide by meiosis include somatic cells (such as liver cells) and haploid (n) cells. Germline cells do undergo meiosis.
In the table below, identify when the four key events occur in a cell undergoing meiosis compared to a mitotic cell:
Event Mitotic Cell Meiotic Cell
Homologous chromosomes form tetrads Do not occur Prophase I
Sister chromatids become separate chromosomes. Anaphase Anaphase II
Homologous chromosomes are pulled to opposite poles. Does not occur Anaphase I
Each chromosome is duplicated into a pair of sister chromatids S phase S phase
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