Describe the process of mitosis and meiosis.
Answers
Answer:
Mitosis:
Mitosis has 4 stages total and produces 2 diploid daughter cells. The purpose of mitosis is for cellular proliferation. Since we only get 2 daughter cells, the chromosome number remains the same and generic variation doesn't occur.
Meiosis:
Meiosis has 8 stages total and produces 4 haploid daughter cells. In the shortest nutshell, meiosis is mitosis but twice. The purpose of meiosis is sexual reproduction. Since we get 4 daughter cells, the chromosome number is halved and generic variation does occur.
The process of dividing the pre-existing cell into two or more daughter cells is called cell division.
Mitosis
Mitosis is defined as the division of the cell in which a single cell divides to form two daughter cells, having the equal number of chromosomes as present in the mother cell. In mitosis cell division, chromosomes duplicate and equally distribute into two diploid cells. Thus as a result, all the daughter cells come to have the same number of chromosomes compared to the mother cell. It occurs in somatic or vegetative cells.
Meiosis
Meiosis is a types of cell division in which a mother cell divides into four daughter cells and each daughter cell having only the half number of chromosomes as compared to mother cell. Meiosis cell division comprises two divisions: Meiosis I and Meiosis II
The meiosis I division is also known as reduction division. This is because it involves the formation of two daughter nuclei with just half number of chromosomes as that present in the another cell. more over, in the prophase stage of meiosis, crossing over ( interchange of chromosome segments between two homologous chromosomes) takes place. This causes the variation in the off-spring and gas a role in evolution.
The meiosis II is also called equational division because the number of chromosomes remains the same in the daughter nuclei as after meiosis I. In this way, four daughter haploid nuclei formed. Then the divison of cytoplasm of the cell ( cytokinesis) takes place and all nuclei get their own cytoplasm and form four haploids.
Hope this helps....
Good luck on your assignment...
Related Questions
Where is our sun located in the Milky Way?
O at the tip of one of the spiral arms
O within one of the spiral arms
O at the exact center of the galactic nucleus
O in the galactic halo
Answers
Answer:
B is the answer
Explanation:
The sun is located within one of the spiral arms, the Orion Arm to be exact.
3. Were you able to restore the land? Why or why not?
Answers
Answer:
yes yes I was
Explanation:
I invested with money for crops and bammo bingo land back!!!
In what way is DNA replicated
Answers
Answer: DNA replication occurs in two steps.. first, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.
Explanation:
Answer:
The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.
Explanation:
Which endocrine gland is indicated by the arrow?
pineal gland
adrenal gland
hypothalamus
ovary
A human body with endocrine glands are shown. The glands on the kidneys are indicated by the arrow.
Answers
Answer:
its the adrenal gland B on ENG 2022
Explanation:
The glands on the kidneys are indicated by the arrow, and the gland is called the adrenal gland which is present in the second option, and there are two adrenal glands on the two kidneys of the human body.
What is the importance of the adrenal glands in humans?The adrenal glands are two small glands located on top of the two kidneys that play an important role in the endocrine system because they produce hormones that help regulate a variety of important functions, such as metabolism, immune system function, and the stress response by releasing hormones like adrenaline, cortisol, and epinephrine, etc, while adrenaline, is released in response to stress or danger, it increases heart rate, blood pressure, and glucose levels, preparing the body for stress.
Hence, the glands on the kidneys are indicated by the arrow, and the gland is called the adrenal gland, which is present in the second option, and there are two adrenal glands on the two kidneys of the human body.
Learn more about the adrenal glands in humans here.
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What additional evidence
do we have today that
supports Darwin's theory?
A. Cell theory
B. DNA and molecular evidence
C. Process of photosynthesis
D. Method of protein synthesis
Answers
Answer: The answer is A cell theory.
Explanation: For our cells to be as developed and complex as they are today a huge evolutional process was necessary. This process is explained in the cell theory
DNA and molecular evidences are the additional evidences to support Darwin's theory. The correct option is B.
What is Darwin's theory?According to Darwin's theory, all species of organisms emerge and develop through natural selection of slight, inherited variations that significantly raise the individual's capacity to compete, stay alive, and reproduce.
It is backed up by research from a wide range of scientific disciplines, as well as genetics, which shows that DNA from different species is similar.
Fossils, embryological studies, anatomical and morphological characteristics, and molecular biology are examples of evidence that support the theory of evolution by comparing DNA sequences.
Thus, the correct option is B.
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Which bone is indicated by the arrow in the diagram below? A diagram showing the appendicular skeleton. An arrow points to the bone in the lower arm closest to the body. humerus ulna radius clavicle
Answers
Answer:
ulna
Explanation:
The ulna runs parallel to the radius in the lower arm.
The ulna is in line with your pinky finger and is the bone closest to the body. The radius is in line with your thumb and allows you to rotate your wrist.
Hope that helps.
Mendel’s pea plants had either purple or white flowers. This means that the plants can self-pollinate. have two recessive traits. have two alleles for the gene. have two copies of a gene from one parent.
Answers
Answer:
I think it's that they have two alleles for the gene
The statement that Mendel’s pea plants had either purple or white flowers means that the plants have two alleles for the gene.
MENDEL'S LAW:Gregor Mendel is regarded as the Father of genetics due to his immense contribution to knowledge of genetic inheritance.
According to Gregor Mendel, a gene consists of two alleles, which individually encode different phenotypes of a particular trait.
In this question involving flower color gene, two alleles coding for purple (P) and white color (p) are present in the gene.
Learn more about alleles at: https://brainly.com/question/2973829
Please if anyone could answer this question? Will mark brainliest!!
Explain the process of gaseous exchange in the alveoli of the lungs.
Answers
Answer: Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. Inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
Answer:
carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
Explanation:
A_____ Cell is one that has one copy of each chromosome
Answers
Answer: Haploid
Explanation:
A Haploid cell that has only one copy of each chromosome which can be paternally or maternally-derived
I hope this helped
A haploid cell is one that has one copy of each chromosome. (Please Put brainliest if correct )
Wildlife experts may attempt to restore the population of an individual species ?
by changing the food web of the ecosystem.
by moving the species to a rain forest.
through captive breeding.
by introducing an exotic species into the population.
Answers
Answer:
C
Explanation:
through captive breeding. Once they are breed, they should be released
What is the benefit of using a shortcut in a reaction between two chemicals? A shortcut would ensure a safer reaction. A shortcut may provide a faster reaction. A reaction with a shortcut would yield more chemical output. A reaction with a shortcut would require less chemical input.
Answers
Answer:
A shortcut may provide a faster reaction
Explanation:
Chemical reactions occur in a particular manner and speed if allowed to occur normally. However, shortcuts can be used for the essence of making the reaction proceed much faster than it naturally would. Catalysts are the substances used to provide these shortcuts.
A catalyst is a substance that increases the rate at which a chemical reaction occurs without being chemically used up in the reaction. A catalyst speedens up the chemical reaction by decreasing the activation energy. The activation energy is that energy needed for a chemical reaction to kick start. The higher the activation energy, the slower the reaction proceeds.
A catalyst, thus, creates a shortcut by lowering the activation energy of the chemical reaction, allowing it to proceed faster than when a catalyst is not used.
Answer:
B
Explanation:
Edge 2020
What factor determines how much linoleic acid can twist and bend its shape?
A. The weight of the molecule
B. The number of carbon-hydrogen bonds
C. The length of the molecule
D. The number of carbon-carbon double bonds
Answers
What does Saccharomyces cerevisiae (Baker’s yeast) need to survive?
Answers
Answer:
Food (Sugars)
Explanation:
S. cerevisiae feeds on sugars for energy, in the process producing carbon dioxide and alcohol (this is fermentation in a nutshell). The carbon dioxide bubbles get trapped in the dough, creating the lift that makes the dough rise. The alcohol, meanwhile, evaporates when baking, transforming into gas that also contributes to the rise of the bread. The alcohol, along with acids produced during the fermentation process, impart that wonderful flavor and aroma associated with yeast-leavened breads.
People who inherit familial periodic paralysis often develop very low blood potassium
concentrations. How would you explain that the paralysis may disappear quickly when potassium
ions are administered intravenously?
Answers
What is the correct order of
evolution of the major types
of pants?
A. Non vascular, Gymnosperm,
Vascular seedless, Angiosperm
B. Vascular seedless, Non
vascular, Angiosperm,
Gymnosperm
C. Non vascular, Vascular
seedless, Gymnosperm,
Angiosperm
D. Angiosperm, Gymnosperm,
Vascular seedless, Non vascular
Answers
Answer:
The correct order of evolution is C- Non Vascular, Vascular seedless, Gymnosperms, Angiosperms.
Explanation:
The first plants to evolve were the non-vascular bryophytes like fungi and algae.
The next to evolve were vascular plants that supported a vascular tissue system but lacked seeds.
Gymnosperms are vascular plants that have seeds.
The seeds produced in the gymnosperms could undergo fertilization easily as the wind acted as pollen carrier.
The next to evolve were angiosperms or flowering plants.
Flowering plants have highly modified shoots that carry male as well as female gametes.
All of the following are efforts to save a species close to extinction EXCEPT ? genetic preservation. fragmentation. captive-breeding programs. zoos and aquariums.
Answers
Answer:
fragmentation
Explanation:
What is your hypothesis for the numbers of each phenotype after 32 fertilizations (HINT: Use a Punnett square to come up with the ratio and then determine how much of each if you have 32 individuals.)
Answers
Answer:
I need more clarification on what to use in the punnet square
Explanation:
What is the range for the following set of measurements?
27°C, 12°C, 31°C, 19°C, 23°C, 11°C, 17°C
A. 0°C to 100°C
O B. 27°C to 17°C
O c. 1°C
D. 11°C to 31°C
Answers
Answer:
the range of the following set of measurement is D option
During the transmission of signals across a neuromuscular junction, which of the following happens first?
A. Acetylcholine binds to a receptor protein on the motor end plate
B. The sodium and potassium ion gates on the motor end plates open
C. Synaptic vesicies release acetylcholine molecules
D. Synaptic vesicles move toward the axon terminals
Answers
Answer:
D. Synaptic vesicles move toward the axon terminals.
This happens at first
8) The plasma membrane is composed of a double layer of molecules called
molecules, which have a
head and 2
tails pointing toward each other. The mechanical stability of the membrane lies with
molecules. The protein molecules function in
and
Answers
Answer:
Your answer would be Phospholipids
Explanation:
The phospholipid bilayer that makes up the plasma membrane has hydrophobic tails and polar heads that face each other to repel water.
What is a plasma membrane?The membrane that divides the inside of the cell from the external environment is known as the plasma membrane, sometimes known as the cell membrane, and it is present in all cells.
A cell wall is affixed to the plasma membrane on the outside of both bacterial and plant cells. The plasma membrane is made up of lipids and proteins, much like every other cellular membrane.
Therefore, the phospholipid bilayer, which creates a permanent barrier between two aqueous compartments, is the membrane's basic structural component.
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Animals in the same phylum may have different nervous system structures. For example, octopuses have large, complex brains while clams have a simple _____ network.
Answers
Answer:
The answer is ring - like
Clams have the ganglia that form a ring around esophagus and that is why this network is called ring - like.
hope this answer correct (^^)..
Which component of Earth’s atmosphere is decreased due to photosynthesis? ozone oxygen hydrogen peroxide carbon dioxide
Answers
Answer:
The answer is carbon dioxide
Hope this helps you
Answer:
carbon dioxide
Explanation:
What is a biome i need help on this
Answers
Answer:
A biome is a large area with a unique climate. The plants and animals share common characteristics in the environment they live in.
Examples of biomes are tundra, forests, grasslands, and deserts.
Answer:
This is a community of plants and animals that have common behaviour for the place they live in.
Explanation:
They are found in a range of continents.
A wave is known to have a frequency of 20 Hz and wavelength of 0.5 m. Find the velocity of this wave.
Answers
Answer:
take 20 * 0.5 to get 10 m/s
Explanation:
Note-taking can be an effective study strategy if you:
a record everything verbatim.
b. use a laptop to take notes.
c. take notes by hand.
d. take notes only on your second read-through.
Answers
Answer:
c. take notes by hand
Hope this helps.
Please answer this biology question
Answers
Answer:
1. The objective lenses on a compound light microscope sample can be magnified either, 40x, 100x or 400x as it does have powers 4x, 10x, and 40x on the maximum power setting.
At 40x magnification Stella will see cell upto 5mm.
At 100x magnification Stella will be able to see cell and cell components upto 2mm.
At 400x magnification Stella will be able to see cell and cell structures more closely, 0.45mm, or 450 microns.
2. The white blood cells are stained here in purple and can be identified with their shape and size of nucleus in comparison to the red blood cells have bioconcave shape and smaller to the wbc, but the function of white blood cells does not allow them to have a set shape. And the white transparent part are platelets.
What is the effect of the inheritance of one trait on the inheritance of a second trait?” with a hypothesis. Remember that you can either assume that the two genes are independent or that they are linked. What results would you expect in either case?
Hypothesis:
Answers
Identify characteristic of alcohol. a. It is a key ingredient in dietary supplements. b. It provides water but not calories. c. It enhances the repair of body tissues. d. It provides calories. e. It is an essential nutrient.
Answers
Bacteria with the ability to break down certain types of plastic are placed with a colony of E. coli bacteria that lack this ability. Plasmid transfer occurs between the two colonies of bacteria and some of the E. coli gain the ability to break down plastic as well. What inference can be drawn about the nature of plasmids from this observation? A. Plasmids are carbohydrates which provide structural support. B. Plasmids are lipids which provide energy for the cell. C. Plasmids are proteins which build tissues. D. Plasmids are nucleic acids which can pass on traits
Answers
Answer:
D. Plasmids are nucleic acids which can pass on traits
Explanation:
A Nucleic acid is one of the four biomolecule polymers in living systems. It is made up of monomeric units called Nucleotides. RNA and DNA are the two nucleic acids in existence and they function in storage and expression of genetic information.
According to the question, a colony of bacteria that can break plastics were mixed with the colony that can't break plastics. The two different colonies engage plamids, which conferred the ability to break plastics to some of the colonies that previously couldn't. This tells us that the ability to break plastics in the certain bacteria colony is GENETIC.
If the trait is genetic, the plasmid must be a nucleic acid because of the ability to genetically pass on traits. Note that, a plasmid is an extra-chromosomal DNA (nucleic acid) capable of replicating on its own. Hence, plasmids are nucleic acids which can pass on traits.
What is the nature Conservancy? a.An organization that collects resources to buy land and establish Nature preserves b.And organization that rescues Endangered species c. And organization that runs breeding programs for endangered species d.An agency of the EPA that manages wilderness areas