Answer:
Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.
A student is testing isopods’ response to light. Isopods (also known as pill bugs or sow bugs) are crustaceans that breathe through organs that need to be kept moist. The results of the experiment show that the isopods move away from light and gather in dark areas as soon as they hatch. Select two statements that explain whether this behavior by the isopods is innate or learned and what adaptive advantage this behavior may have.
A. This behavior appears to be innate, because the isopods could not have learned the behavior during the experiment. The animals exhibited this behavior as soon as they were exposed to the light, right after they hatched.
B. This behavior has an adaptive advantage for isopods because dark areas in nature are usually moist. Those isopods that moved to dark, moist areas were more likely to survive and pass the genetic trait to their offspring.
C. This behavior appears to be learned, because the isopods only exhibited this behavior after they were exposed to the light in the experiment.
D. This behavior is artificial and therefore does not have an adaptive advantage for isopods in nature, because those isopods that moved to dark, moist areas would more likely become food for predators and would not survive.
The behavior of isopods has an adaptive advantage for them because dark areas in nature are usually moist. Those isopods that moved to dark, moist areas were more likely to survive and pass the genetic trait to their offspring. Thus, the correct option is B.
What is Adaptive advantage?An adaptive advantage is a reproductive advantage in an organism that derives from being well-suited to the specific environment in which it lives. Adaptive advantage is likely to result in an organism that is producing more offspring than those organisms without the adaptive advantage.
Isopods show adaptive advantage because isopods move to dark areas away from light which are usually moist. The isopods that moved to the dark, moist areas were more likely to survive and pass the genetic trait to their offspring than other isopods.
Therefore, the correct option is B.
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the diagram represents protein synthesis which is essential to the function of all cells. what is represented by C?
The part of the diagram that represents transcription is C.
What is the essential part of every cell?Transcription simply means the process where the information that's in a strand of DNA is copied into a new molecule of messenger.It should be noted that transcription takes place in a nucleus. The diagram depicted represents structures and processes involved in protein synthesis in an animal cell. The part of the diagram that represents transcription is X.As the name implies, protein synthesis, involves the synthesis of proteins in a cell. Cellular structures in a cell called organelles are responsible for this function. These organelles include ribosome and rough endoplasmic reticulum.The ribosome is an organelle found in all cell types and is the site for the synthesis of proteins in the cell. The ribosome is where translation (process of synthesizing amino acid chains from mRNA) occurs. The chains of amino acid later becomes the protein.The Rough endoplasmic reticulum (RER) gets it "roughness" from the fact that RIBOSOMES are attached to its surface. Due to this, the RER functions in the synthesis of proteins. The RER is involved in the production, folding and packaging of proteins in eukaryotic cells. The RER processes the polypeptide produced by the ribosome into proteins that are carried to varying destinations.To learn more about cells refer to:
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Earth’s surface contains a variety of landforms, formed by weathering and erosion. Which of the following describes a change to Earth’s surface due to weathering? Choose the three that apply.
The following statement below describes a change to Earth’s surface due to weathering :
A. plants creating a crack in a rock formation
B. rocks along the beach being reshaped by wave action.
F. glaciers scraping rocks across the land
What is a Wave?This is referred to as a disturbance in a medium that carries energy without a net movement of particles.
Weathering can be defined as the breaking down of rocks as a result of certain factors such as rain, heat etc. They also form different types of cracks in the rocks after which they start disintegrating into tiny particles.
This process also occurs when the rocks which are present in the beach are being reshaped by wave action and the others mentioned above which is therefore the reason why option A, B and F was chosen as the correct choice.
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The options are:
A. plants creating a crack in a rock formation
B. rocks along the beach being reshaped by wave action
C. sand being blown to a new location by the wind
D. sediments moved from place to place by a river
E. rain washing soil down a steep hill
F. glaciers scraping rocks across the land
One of the keys to success for Mendel was using pea plants. Explain how using pea plants allowed Mendel to control mating?
Mendel used pea plants in his experiments in which he was able to control mating because of the pollination characteristics of the pea plant.
What is Mendel's genetics?Mendelian inheritance of Mendel's genetics refers to certain patterns of how the traits or characteristics are passed on from the parents to their offspring.
Mendel used garden pea plant (Pisum sativum) in his experiment of how the characters or traits transfer from one generation to the next generation. Mendel had various reasons to use pea plants for his genetic experiment study such as the observability of the pea plant's traits, ease of reproduction etc. However, the main reason for him using garden pea plant is because these plants allowed him to have controlled mating that is what made the traits more controllable and therefore Mendel was sure about his observations and results.
It was possible because the pea plants, during their flowering periods, are protected from the alien pollinators, therefore he could control the pollination process in the pea plant, which was a crucial part in terms of accuracy and reliability of the results.
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Do prokaryotic cells have nucleus?
Answer:
Prokaryotes do not have a nucleus. Instead prokaryote DNA can be found, bundled but free-floating, in a central region called the nucleoid.
is biotechnology a new science? support your answer with specific examples
Biotechnology is not a new science but has always been applied by man in such processes as the fermentation of foods.
What is biotechnology?Biotechnology is the process whereby living organisms are applied in industrial or technological processes to produce materials that are required by man for his use.
Biotechnology is a very old science because humans have from ancient times used microorganisms to produce various goods that are needed by man.
For example, biotechnology is seen in the ancient process of bread-making and fermentation of foods.
Even though humans might not have known this, these are all instances of biotechnology.
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Write a paragraph describing the primary differences between plant and animal cells. Be sure to include a discussion of the various organelles specific to each cell and how they differ between plant and animal cells.
The difference between animal and plant cells is that they contain different organelles, among these are the chloroplasts that plant cells contain and animal cells do not.
What are the differences between animal and plant cells?Each of these cells will have their own requirements, which is why they will have different types of organelles to be able to meet these requirements. Among the differences will be that plant cells will have chloroplasts to be able to generate their own food since they cannot obtain it by other means, so they will manufacture sugar through sunlight.
In plant cells it will have a cell wall that will be surrounded by a cell membrane. While animal cells will not have this cell wall.
Therefore, we can confirm that plant cells and animal cells will have differences in their content, function and organelles.
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Answer:
The primary differences between animal and plant cells concern the types of organelles present within them. Although these cell types are similar in that they’re both eukaryotes, plant cells have several structures not present in animal cells: chloroplasts, amyloplasts, and cell walls.
Explanation:
p foster
Any change to a sequence
of DNA is known as what?
A. mutagen
B. cancer
C. mutation this
Answer:cancer
Explanation:
Answer:
c) Mutation
Explanation:
Mutation is the change in a DNA sequence, it occurs due to error in the DNA replication of an organism. Therefore, the option (c) is the correct answer.
Which discovery is attributed to Phoebus Levene?
extraction and observation of DNA
identification of ribose and deoxyribose
recognition of RNA as DNA’s messenger
construction of an accurate DNA model
Identification of ribose and deoxyribose discovery is attributed to Phoebus Levene. Therefore, option B is correct.
What is ribose ?Ribose is a type of sugar that the body uses to produce the energy-containing substance adenosine triphosphate (ATP), which is depleted during strenuous exercise. Ribose has been reported to increase power during short, intense burst of exercise.
Ribose is a monosaccharide, or simple sugar, which is an organic compound. Ribose is a bonded compound of five carbon atoms, ten hydrogen atoms, and five oxygen atoms. Ribose is a type of pentose sugar.
Thus, option B is correct.
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Which is NOT a type of
point mutation?
B. chromosomal mutations
Answer:b
Explanation:
Select the components of the cell theory. (Choose all that apply.)
Group of answer choices
A. The cell is the basic unit of life for living things.
B. All things living and non-living have cells.
C. All living things are composed of one or more cells.
D. All cells have the same internal structure.
E. All cells come from pre-existing cells.
Answer: A. and C.
Explanation: All living organisms are composed of one or more cells
LAB REPORT, I NEED HELP WITH THIS QUESTION.
The title, abstract, introduction, methods and materials, findings, discussion, conclusion, and references are the eight sections that make up a lab report.
What is purpose of lab report?
Lab reports are an essential component of the scientific method. In order for someone who wasn't present to comprehend and repeat your results, the crucial work you did in the lab should be communicated in your lab reports. Additionally, they advise new research and experimentation, as well as changes to current techniques.
The components TITLE, INTRODUCTION, PROCEDURE, RESULTS, and DISCUSSION/CONCLUSION make up a standard report. Section headings should be in bold if you are typing your work on a computer.
The purpose of the experiment is stated in the beginning of a lab report, which also gives the reader some background information. Declare your report's topic in a straightforward and succinct manner (in one or two sentences). Give the reader any necessary background theory, prior study, or formulas.
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The picture below shows examples of fossils commonly seen in Big Bend National Park which is is part of the Chihuahuan Desert in West Texas. All three fossils are marine animals.
What does the presence of these fossils suggest about the past climate and area where Big Bend National Park is located?
pls help
It form an northern extension of Chihuahuan Desert. All three fossils are marine animals.
What is big bend national park?The big bend national park is an extension of southwest texas and includes the entire mountain ranges and a large part of the Chihuahuan Desert this desert is the largest desert of North America and consists of various water sources. Forming a part of the physical feature of Mexico and west Texas.
Chihuahuan Desert this desert is the largest desert of North America and consists of various water sources. Forming a part of the physical feature of Mexico and west Texas.
Therefore, It form an northern extension of Chihuahuan Desert. All three fossils are marine animals.
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Use the codon chart above to determine the amino acid produced from an RNA Codon of UCA.
Leucine
Proline
Tyrosine
Serine
The codon chart of serine the amino acid produced from an RNA Codon of UCA. Hence option 4 is correct.
What are amino acids?Amino acids are defined as the substances that are organic and have both amino and carboxylic acid functional groups. Amino acids' principal purpose is to create proteins by acting as their building blocks. Between 50 to 2000 amino acids are usually connected end to end in a wide variety of ways to make proteins.
Although serine is typically categorized as an amino acid that is not necessary for human nutrition, metabolically speaking, serine is indispensable and plays a crucial function in a number of cellular processes. For methylation processes that result in the production of S-adenosylmethionine, serine is the main source of one-carbon units.
Thus, the codon chart of serine the amino acid produced from an RNA Codon of UCA. Hence option 4 is correct.
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How would the bonding of a purine with a purine alter the dna molecule
A purine interacting with another purine would be problematic for the structure of the DNA molecule.
One of the two categories of nitrogenous bases found in DNA is purines; the other are pyrimidines.
Adenine (A) and guanine (G) are examples of purines, and they invariably couple with thymine (T) and cytosine (C), which are complementary pyrimidine bases.
DNA molecule. In the DNA molecule, pairings of two purines, such as adenine and guanine or guanine and guanine, would result in a bulky structure that would not fit into the double helix properly. The hydrogen bonds between the two strands of DNA would be broken as a result, which might result in a break in the DNA strand and mutations.Purine-purine bonding is therefore not conceivable in a DNA molecule because DNA's structure is highly particular and meticulously controlled to ensure its stability and function. For DNA replication and transcription to work appropriately, which is crucial for the transmission of genetic information and maintenance of life, the right matching of purines with pyrimidines is required.learn more about purine here
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What is the correct concept map showing the neural pathway of a sensory impulse from the forearm to the spinal cord?
1) Stimulus -> Dorsal ramus -> Spinal nerve -> Dorsal root ganglion -> Dorsal root ->
Posterior gray horn -> Somatic sensory
2) Stimulus -> Ventral ramus -> Spinal nerve -> Dorsal root ganglion -> Dorsal root ->
Posterior gray horn -> Somatic sensory
3) Stimulus -> Dorsal ramus -> Spinal nerve -> Vental root -> Anterior gray horn ->
Somatic motor
(HELP NEEDED ASAP. I REALLY APPRECIATE IT. THANK U SO MUCH)
Answer:
The correct answer is (A). Stimulus travels as a nerve signal on a nerve fiber. EDIT: Answer B
Explanation:
6. Betsy tries to attract a variety of birds to her backyard. She puts up a bird feeder that contains sunflower seeds and corn. Which term best describes the contents of the bird feeder?
A. a mixture
B. a solution
C. an element
D. a compound
Explanation:
ans ; A
they are not chemically bonded together neither are they one.
please mark brainliest
The term that best describes the contents of the bird feeder is a mixture. Thus, the correct option for this question is A.
What is a Bird feeder?A bird feeder may be defined as a type of device that is placed outsides in order to supply bird food to birds. The success of this mechanism depends on attracting birds from its placement and the kinds of foods offered, as different species have different preferences.
Betsy puts up a bird feeder that contains sunflower seeds and corn. In this context, sunflower seeds and corn are not able to solubilize each other, so they do not represent a solution. But they are randomly intermingled with one another in order to form a mixture.
Therefore, a mixture is a term that best describes the contents of the bird feeder. Thus, the correct option for this question is A.
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Biochemical oxygen demand is a measure of the
Answer:
A measure of the amount of oxygen necessary to decompose organic material in a unit volume of water. As the amount of organic waste in water increases, more oxygen is used, resulting in a higher BOD.
Explanation:
What chromosomes
determine the gender of an
organism?
A. all
B. sex this is answer
C. autosomal
4 Which characteristics of living organisms are shown as the head of a flower faces the sun all day?
A excretion and growth
B nutrition and irritability
C irritability and movement
D movement and respiration
5 Which is common to all organisms?
A asexual reproduction
B breathing
C excretion
D locomotion
6 Which features are not common to living things and most machines?
A excretion/eliminate waste
B movement/propulsion
C reproduce/self-duplicate
D respiration/combustion
7 What do you think has been least important to human evolutionary success?
A a large well-developed forebrain
B large size
C opposable thumbs
D stereoscopic vision
8 Which of the following characteristics is present in humans but not all other mammal species?
A constant body temperature
B diaphragm
C mammary glands
D vocal cords
9 The Aedes mosquito transmits the dengue virus. What is the role of the mosquito and the virus?
Mosquito Virus
A a pathogen a pathogen
B a pathogen a vector
C a vector a pathogen
D a vector a vector
10 Which feature of humans is best helped by them being bipedal?
A intelligence
B locomotion
C swimming
D tool making
Short answer and essay type questions
11 (a) List the characteristics you would use to decide if something was living or dead.
(b) Which of these characteristics would best show you quickly whether an animal, which appears to be dead, is living?
12 Give a brief definition of the following terms
(a) respiration
(b) irritability
(c) nutrition
13 Under the headings organ, stimulus and response, list all the organs of the body that can detect stimuli, alongside name the stimulus and then the body's response.
4. Excretion and growth is a characteristics of living organisms that is shown as the head of a flower faces the sun all day.
Option A is correct.
5. That which is common to all organisms is excretion.
Option C is correct.
6. Movement/ propulsion are features that are not common to living things and most machines.
Option B is correct.
7. Large size has been least important to human evolutionary success?
Option B is correct.
8. The characteristic that is present in humans but not all other mammal species is vocal cords
Option D is correct
9. The Aedes mosquito transmits the dengue virus. The role of the mosquito is pathogen and the virus is a vector.
Option B is correct.
10. The feature of humans is best helped by them being bipedal is locomotion
So, option B is correct.
11. Growth and development,
reproduction
made of cells, response to its environment,
adaptation
11b, all the characteristics shown above.
12a respiration is the movement of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction that's to the environment.
12b, Irritability is a feeling of agitation that you might experience as a result of stress, mental health conditions, or physical disorders
12c, Nutrition is the biochemical and physiological process by which an organism uses food to support its life.
13. eyes is for sight
noses are for smell,
we listen with our ears,
we taste with our tongue,
and we touch with our skin.
What is excretion?Excretion is described as a process in which metabolic waste is eliminated from an organism.
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Please help THE QUESTION IS THE IMAGE THERE NEEDS TO BE A CODEE
Diploid organisms are those that can reproduce sexually. Only the sperm and egg contain haploid cells in humans.
What is reproduction?The process of creating new organisms (offspring) of the same kind is referred to as reproduction. By creating variations through DNA recombination, it aids in evolution. It contributes to the biological variety of the ecosystem.
Diploid cells have two complete sets (2n) of chromosomes. A diploid cell has two entire sets of chromosomes, whereas a haploid cell has one complete pair and half as many (n) chromosomes.
Thus, diploid organisms are those that can reproduce sexually. Only the sperm and egg contain haploid cells in humans.
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what is a structure that develops in the mesoderm and allows for more complex internal organ formation
The structure that develops in the mesoderm and allows for more complex internal organ formation is coelom.
what is coelom?
The coelom develops within the mesoderm during embryogenesis. In most animals, the coelom (or celom) is the major bodily cavity that surrounds and contains the digestive tract and other organs.
What are the functions of coelom?
Coelom acts as a shock absorber and protects against mechanical shock. It allows the body organs to move more freely and protects them from damage caused by minor bends by cushioning the internal organs.The coelomic fluid also helps in gaseous transport and transport of nutrients and waste products.Coelom provides the additional room that organs require to grow and function. Because of coelom, things like heart pumping, bearing a kid in the womb, and so on are conceivable.The structure that develops in the mesoderm and allows for more complex internal organ formation is coelom.
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I need answers this is hardddd!!!!
Answer:
answer is A
Explanation:
The cell membrane ___________.
Group of answer choices
A. helps to protect the cell
B. produces glucose
C. produces energy
D. keep the internal conditions of the cell stable
Answer:
The cell membrane helps to protect the cell.
Explanation:
The plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment. In bacterial and plant cells, a cell wall is attached to the plasma membrane on its outside surface. The plasma membrane consists of a lipid bilayer that is semipermeable. The plasma membrane regulates the transport of materials entering and exiting the cell.
What is form?
A. A mark that has length and direction
B. Shape with height, width, and depth
C. The area between and around objects
D. The way a surface fells or looks
Anyone have an answer for this question>?
Place the following labels in order indicating the passage of sound waves and their conversion to fluid waves through the ear and hearing apparatus.
Click and drag the terms from the left into the spaces provided on the right. Arrange them so they accurately display the pathway of an assertory repulse in chronological order.
Passage of sound in the correct order is;
auricle, auditory canal, tympanic membrane, malleous, incus, stapes, oval window, scala vestibuli, cochlear duct, scala tympani, secondary tympanic membraneFor the second image, from left, clockwise:
The impulse travels to the primary auditory cortex in the superior margin of the temporal lobeThe impulse travels from the cochlea along the cochlear nervethe impulse then travels to the cochlear nuclei of the medulla oblongata and the superior olivary nuclei of the ponssome fibers from the cochlear nuclei extend to the inferior colliculi of the midbrainthird-order neurons head from the inferior colliculi to the thalamusHow does the auditory impulse work?As fluid moves about 25,000 nerve endings transform vibrations in the ear to impulses of electrical forms that travel along the cranial nerves and to the brain.
The impulse travels to the auditory cortex then to the cochlea to the medulla oblongata and so on.
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What are some behavioral adaptations for a lion
Explanation:
Puffing: The lion pride makes this low-pitched sound to prevent fights.
Woofing is the term for a sound that resembles a scream for aid.
Grunting: The head lion or will be keeping an eye out for potential threats while a pride of lions is out and about.
red wolves are aa endangered species in the United States. which agency is responsible for their protction
Answer:
the US fish and wildlife service
Explanation:
15. Examine the image below.
3 States of Matter
Which of the following statements is false concerning states of matter and kinetic energy?
A. Fewer particles indicates there is more kinetic energy
B. As temperature increases so does kinetic energy
C. As temperature decreases particles move closer together
D. As the number of particles increases so does kinetic energy
Examine the following images, the false concerning about states of matter and kinetic energy are:
(A) Fewer particles indicates there is more kinetic energy.
(B) As temperature increases so does kinetic energy.
(C) As temperature decreases particles move closer together
What is difference between solid, liquid and gas?Solid molecules are held in fixed pattern but they are vibrating. And they are closely packed.
Liquid molecules packed close together in a random fashion, and free to move.
Gaseous molecules are widely separated and move at great space.
(A) We will have higher velocity or speed if we have less mass. This indicates that bigger particles with higher mass travel at a slower rate. Smaller particles with less mass travel faster.
(B) The average particle kinetic energy rises as an object's temperature rises. The thermal energy of the item grows as the average kinetic energy of its constituent particles rises. As a result, as an object's temperature rises, its thermal energy rises as well.
(C) The transition from a liquid to a solid state is known as freezing. Thermal energy is lost when the liquid cools. Its constituent particles, therefore, decelerate down and converge. Attractive forces start to trap particles, and crystals of a solid form.
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What causes Huntington's
disease?
A. a mutation of a repeated codon CAG that
repeats 40 or more times this
B. a mutation causing an inability to break
down fatty tissue around the brain
C. an altered shape of hemoglobin where it
folds incorrectly
Answer: A.) A mutation of a repeated codon CAG that repeats 40 or more times
Explanation:
With time, Huntington's disease impairs certain areas of the brain's functionality. It is something that a person inherits from their parents. It frequently becomes fatal after up to 20 years of progressively worsening symptoms.
A huntingtin protein gene mutation is the root cause of Huntington's disease. The cytosine, adenine, and guanine (CAG) DNA building components repeat far more times than they should due to the flaw. A parent with HD has a 50/50 chance of passing the HD gene to each of their children.
Initial signs of Huntington's disease frequently include:
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