Red blood cells carry antigens on their surfaces coded for by alleles of the gene designated by the letter i. Ia is dominant to i and produces antigen a on the surface of red blood cells. The ib allele is also dominant to the i allele and produces antigen b on the surface of red blood cells. The i allele does not produce surface antigens.
Red blood cells carry antigens on their surfaces that are determined by alleles of the gene designated by the letter "i". The Ia allele is dominant over the i allele and produces antigen "a" on the surface of red blood cells.
The ib allele is also dominant to the i allele and produces antigen "b" on the surface of red blood cells. The i allele does not produce any surface antigens. This information can be useful in blood transfusions and understanding the immune system, as an individual with the Ia allele will have red blood cells with antigen "a" on their surface and an individual with the ib allele will have red blood cells with antigen "b" on their surface. These antigens can trigger an immune response if mismatched during a blood transfusion, so it is important to match blood type based on these antigens.
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What can humans do to make the renewable forest resources last longer?
Answer:
Sustainable forestry practices: This involves using techniques such as selective logging and reforestation to ensure that forest resources are used in a responsible and sustainable manner, without damaging the ecosystem.
Protection of forests: Protecting forests from illegal logging, fires, and other forms of destruction can help to ensure that these resources remain intact for future generations.
Reduced deforestation: Deforestation is a major contributor to the loss of forest resources, so reducing deforestation is crucial in maintaining forest cover. This can be achieved by promoting sustainable agriculture and other land-use practices that reduce the need to cut down forests.
Efficient use of forest products: Making more efficient use of forest products, such as paper and wood, can reduce the amount of resources required and help to extend their lifespan.
Increased reforestation: Planting new trees can help to replace those that have been lost, and increase the overall forest cover.
Restoration of degraded forests: Restoring degraded forests can help to rebuild the health of these ecosystems and support the recovery of forest resources.
Explanation:
Answer:
Reducing the use of forest resources can enable humans to make it last longer.
Explanation:
A reduction in the use of forest resources can help with the mitigation process. Mitigation can be defined as the reduction of loss during any natural disaster. Forest is a rich source of oxygen, so we have to be very careful about the conservation of forest resources. It also serves numerous others functions like it can be used as a shelter for different animals and birds. We have to minimize the use of forest products.
The following table shows the duration of a year on some unknown planets of equal mass.
Duration of Year
Planet Duration of Year
Y 224 days
Z 320 days
Which of the following best explains which planet is closer to the sun?
Planet Y, because gravity is directly proportional to the square of distance
Planet Z, because gravity is directly proportional to the square of distance
Planet Z, because the sun exerts a greater gravitational force on it than on planet Y
Planet Y, because the sun exerts a greater gravitational force on it than on planet Z
Answer: Planet Y, because the sun exerts a greater gravitational force on it than on planet Z
Explanation:
Can someone help me with this phone pls it’s due asap
New technologies has allowed scientists to build cladograms based on similarities in DNA. Thus, option A is correct.
What is cladogram?A cladogram is a diagram of branches that show the cladistic relationship between animal species. A node you can expect to find on the cladogram would be Deuterostome development. Examples of deuterostomes are starfish and sea cucumbers.
Recombinant DNA technology can be defined as the process that involves manipulation of genetic material of an organism to get the desired trait or product.
Therefore, New technologies has allowed scientists to build cladograms based on similarities in DNA. Thus, option A is correct.
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Teresa wants to explore the relationship between kinetic energy and potential energy. How could she use innovative problem-solving?.
Teresa could be able to solve problems creatively in C. To demonstrate the relationship between kinetic and potential energy, she should choose a personal example of each and design an experiment to demonstrate it.
How does kinetic energy work?Kinetic energy is the energy that an object possesses as a result of motion.The effort necessary to move a mass-determined body from rest to the given velocity is what is referred to as the effort.In the absence of a change in speed, the body retains the kinetic energy it gained during acceleration.Option C is the best response because it best explains the link between kinetic energy and potential energy.For more information on kinetic energy kindly visit to
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Complete question : Teresa wants to explore the relationship between kinetic energy and potential energy. How could she use innovative problem-solving?
A. Follow the instructions of her science teacher for performing an experiment about kinetic and potential energy.
B. Search the internet for ways to show the relationship between kinetic and potential energy.
C. Find an example of kinetic and potential energy in her own life and create an experiment to illustrate their relationship.
D. Study the relationship between kinetic and potential energy in her science textbook.
How does Amyotrophic lateral sclerosis affect homeostasis?
Answer:
Amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease, is a neurodegenerative disorder that affects the motor neurons responsible for controlling voluntary muscles. This leads to progressive muscle weakness and atrophy, which can ultimately lead to complete paralysis.
The impact of ALS on homeostasis is significant, as the loss of muscle control affects the body's ability to maintain proper balance, posture, and mobility, making it difficult for the person to carry out normal daily activities. Additionally, as the disease progresses, it can also affect breathing, swallowing, and speaking, which further disrupts the body's ability to maintain homeostasis.
Furthermore, ALS can also lead to a number of secondary complications such as malnutrition, bedsores, and respiratory infections, which further exacerbates the body's difficulty in maintaining homeostasis. In conclusion, ALS can have a significant impact on the body's ability to maintain homeostasis and can lead to a number of complications that further disrupt this balance.
Explanation:
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder that affects homeostasis by disrupting the balance between different systems in the body.
In ALS, the nerve cells responsible for controlling the muscles (motor neurons) gradually deteriorate and die, leading to muscle weakness, twitching, and eventually, paralysis. This affects the body's ability to maintain muscle tone and movement, which is essential for maintaining posture and balance.
The loss of motor neurons also affects the autonomic nervous system, which controls the body's unconscious functions such as heart rate, blood pressure, and digestion. This can lead to problems with homeostasis, such as difficulty swallowing, breathing difficulties, and changes in blood pressure and heart rate.
In addition, ALS can affect the body's ability to regulate temperature and respond to stress, as well as its ability to produce energy and remove waste, which are all crucial components of homeostasis.
Therefore, ALS has a significant impact on homeostasis by disrupting the balance between different systems in the body, leading to a wide range of physical and physiological symptoms.
The haploid cells of a kangaroo contain 8 chromosomes. How many chromosomes are in a kangaroo's diploid cells?.
The number of chromosomes in a kangaroo's diploid cells is 16, as opposed to the haploid cells 8 chromosomes.
In a kangaroo's diploid cells, how many chromosomes are there?Chromosome number 20 in the red kangaroo is diploid (2n = 18+XY, 2n = 18 + XX). All chromosomes can be distinguished morphologically, with the exception of chromosomes 8 and 9, which can be distinguished by G-banding (Rofe 1979).
How many chromosomes do kangaroos have that are haploid?The important thing to remember is that these are haploid. We are aware everything is ok. We may show that 1 end would equal 8 points by dividing each side by 2 if 2 n equals 16. Therefore, this kangaroo has a haploid number of 8.
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Earth's atmosphere blocks much of the light that astronomers need to observe distant stars. To get around this problem, nasa put a powerful telescope-.
The majority of the light light astronomers use to study far-off stars is blocked by the Earth's atmosphere. NASA installed a parabolic dish in orbit around the planet to circumvent this issue.
Do you take a breath of the air?arbitrary fact The atmosphere of the Earth is where we find the oxygen we breathe. Did you know that the atmosphere that makes up the coating of air we breathe could be as thin as the apple's skin if the planet were an apple?
The composition of the atmosphereAbout 78% of the gases in the Earth's atmosphere are nitrogen, 21% are oxygen, 0.9 % are argon, and 0.1 % are other gases. The other 0.1 percent of gases includes trace quantities of neon, water vapor, methane, carbon dioxide, and methane.
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2. For the following DNA strand, intron sequences are underlined. Use this strand to write
out both the nRNA and mRNA sequence in the space below (2 marks).
AACAT GCTACATGG GATCATGCATGCATG CA
The nRNA and mRNA sequence will be:
AUGCA UCUGUCAACC GAUCAGUCAGUCAGU CGAUGCA UCUGUCAACC GAUCAGUCAGUCAGU CGHow to find mRNA sequence after splicing?To determine the nRNA and mRNA sequence from the given DNA strand, you need to first transcribe the DNA into mRNA. This process is called transcription and involves copying the DNA sequence into a complementary RNA molecule, which is called messenger RNA (mRNA). During transcription, the introns are spliced out, and the exons (the parts of the DNA that code for protein) are joined together to form the final mRNA sequence.
So for the given DNA strand:
AACAT GCTACATGG GATCATGCATGCATG CA
The mRNA sequence would be:
AUGCA UCUGUCAACC GAUCAGUCAGUCAGU CG
The final mRNA sequence, after splicing out the introns, would be:
AUGCA UCUGUCAACC GAUCAGUCAGUCAGU CG
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wich molecule is like the tank of the delivery truck and which is like the gas tank of the car?
The ATP molecule is like the tank of the delivery truck, while the glucose molecule is like the gas tank of the car.
What are molecules?
A molecule is a collection of two or more chemically bound atoms, whether they are from the same element or another. One molecule of water is created, for instance, when two hydrogen atoms and one oxygen atom combine.
ATP is a biological molecule that stores chemical energy needed by all living cells for metabolic activities. ATP is synthesized during the process of cellular respiration. Glucose molecules are products of digestion in our system, and they hold energy in their bonds. In the process of cellular respiration, glucose molecules are broken down and used to synthesize ATP.
Therefore, ATP molecule is like the tank of the delivery truck, while the glucose molecule is like the gas tank of the car.
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September 22 is the beginning of ________ in the southern hemisphere.
autumn
spring
summer
winter
17. Researchers can add several adenine nucleotides to the end of a strand of mRNA. What could be a practical application of this procedure?
18. A researcher develops a new form of polymerase chain reaction that can amplify long sequences of DNA. Is this technique likely to replace entirely the use of bacteria as cloning vectors? Why or why not?
19. You are studying DNA replication in bacterial cells. In one culture, you note that replication is not producing visible daughter cells. Your analysis shows that about 50% of the daughter cells appear normal, while 50% are volatile and do not form a double helix.
a) Draw and label a diagram that could account for your observation
b) If you centrifuged the DNA from this culture, what would you expect to see?
How are moles and particles related? how would you find the number of particles in 4 moles of a substance?.
6.022 × 10²³ units of a material make up one mole of that substance .numer of particles in 4 mole of substance can be found like this : 4×6.022 × 10²³= 24.088 × 10²³ particles.
What is 6.022× 10²³ called? who is it named after?it is called the Avogardo number or the Avogadro constant and is named after Ameo Avogadro was was an Italian physicist best known for his contribution to the theory of molecules, which is today known as Avogadro's law and asserts that equal volumes of gases at the same temperature and pressure will have the same number of molecules. The Avogadro constant, is the ratio of a substance's amount of substance (which has the unit mole) to the number of elementary entities (atoms, molecules, ions, or other particles) in that material. One of the seven defining constants of the SI, this constant is designated NA.
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The tail points to where the wind is
coming from. If the tail points north, a north wind is moving from north to south.
What direction is the wind coming from on the symbol above?
The direction of the wind is coming from the Southwest.
How can wind direction be found?Wind direction can be measured using a variety of instruments, including the windsock and wind vane. Both of these instruments operate by moving in order to reduce air resistance. The direction from which the wind is blowing is indicated by the way a weather vane is pointed by prevailing winds.
The wind direction is represented by the shaft of an arrow extending from the station circle in the direction of the wind. On the shaft of the wind direction arrow, the wind speed is plotted as feathers and half-feathers representing 10 and 5 knots, respectively.
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The complete question is:
Look at the “tail” that is sticking out from the circle. The tail points to where the wind is coming from. If the tail points north, a north wind is moving from north to south. What direction is the wind coming from on the symbol above? ________________________
What is a solution's absorbance, if its molarity is 0.25M?
The molar absorbtivity constant at 560 nm for this substance is 0.3 M⁻¹cm⁻¹.
The absorbance of the solution is 0.45, the concentration would be 1.5 M.
What is the molar absorbtivity constant?The molar absorbtivity constant is a measure of the ability of a substance to absorb light at a specific wavelength. It is related to the absorbance of a solution by the Beer-Lambert law:
A = ε * b * c
where;
A is the absorbance,ε is the molar absorbtivity constant,b is the path length of the cuvette (in this case, 1 cm), andc is the concentration of the solution.Rearranging the equation to solve for ε:
ε = A / (b * c)
Substituting the values from the question, we have:
ε = 0.075 / (1 cm * 0.25 M)
ε = 0.3 M⁻¹cm⁻¹
(b) To find the concentration if the absorbance is 0.45, we can use the Beer-Lambert law:
A = ε * b * c
Rearranging the equation to solve for c:
c = A / (ε * b)
Plugging in the values from the question and using the value of ε found in (a), we have:
c = 0.45 / (0.3 * 1)
c = 1.5 M
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Complete questions:
A 0.25 M solution is in a tube of path length of 1 cm, has an absorbance = 0.075 at 560 nm.(20)
(a) What is the molar absorbtivity constant (b) What is the concentration if absorbance is 0.45
Geologists can use ________ waves to learn about Earth’s interior. P waves travel faster than S waves. S waves travel through solids only, which tells geologists that the ______ core is liquid.
Geologists call the outer, solid area of Earth the crust; the next layer is the _____ . Finally, at the very center, is the core.
Geologists can use seismic waves to learn about Earth’s interior. P waves travel faster than S waves. S waves travel through solids only, which tells geologists that the outer core is liquid.
Geologists call the outer, solid area of Earth the crust; the next layer is the mantle. Finally, at the very center, is the core.
I apologize if I was wrong. I hope you have a lovely day! :)
Answer: seismic, outer, mantle
Explanation: got it right
What are the labels of this heart diagram?
Structure of Heart
The heart is made up of four chambers. The heart has two chambers on the top (atrium, plural atria) and two on the bottom (ventricles), one on each side.
Right atrium: Two major veins carry oxygen-depleted blood to the right atrium. The superior vena cava transports blood from your upper body to your heart. The inferior vena cava transports blood from the lower body to the heart. The right atrium then pumps blood to your right ventricle.
The pulmonary artery transports oxygen-depleted blood from the lower right chamber to the lungs. The lungs are responsible for replenishing the oxygen in the blood.
The pulmonary veins transport the blood to the left atrium once the lungs have filled it with oxygen. This upper chamber is responsible for pumping blood to your left ventricle.
The left ventricle is somewhat larger than the right. It moves oxygen-rich blood across your body.
The heart valves
Your heart valves function as gates between your heart chambers. They open and close to let blood flow.
The atrioventricular (AV) valves interconnect your heart's upper and lower chambers. They are as follows:
Tricuspid valve: A valve that connects your right atrium to your right ventricle.
Mitral valve: The valve that links the left atrium to your left ventricle.
Semilunar (SL) valves open as blood rushes out of your ventricles. They are as follows:
When blood travels from your left ventricle to your aorta, the aortic valve opens (the artery that carries oxygen-rich blood to your body).
The pulmonary valve opens as blood flows from your right ventricle into your pulmonary arteries (the only arteries that carry oxygen-poor blood to your lungs).
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Since no chemical is completely free of adverse effects, given the right dose and conditions, which of the following statements is most likely to be true O Natural products are safer than synthetic products | Natural products are usually safer than synthetic products Natural products are usually less safe than synthetic products None of the above
None of the above statements can be considered generally true, as the safety of a chemical depends on various factors including dose, exposure, and individual susceptibility.
The safety of a chemical depends on various factors including dose, exposure, and individual susceptibility.
Which is generally safer, natural or synthetic products?None of the above statements can be considered generally true, as the safety of a chemical depends on various factors including dose, exposure, and individual susceptibility.
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Which government agency is responsible
for enforcing RCRA?
A. USGS
B. EPA
C. NPS
D. NOAA
Answer:
The government agency responsible for enforcing RCRA (the Resource Conservation and Recovery Act) is the Environmental Protection Agency (EPA). The EPA is a federal agency that works to protect human health and the environment by regulating and enforcing various environmental laws and regulations, including RCRA. The EPA's mission is to ensure that all Americans have access to clean air, land, and water, and that they are protected from environmental hazards and risks.
Explanation:
In the image below, in which location is carbon released into the atmosphere?
A
B
C
D
Answer: (d) the carbon released into the atmosphere at location D.
Which process had to occur before the theory of evolution was devised?
AConduct a single experiment
B Interpret numerous observations
C Explain earlier theories.
D Obtain a patent for the theory
The process that had to occur before the theory of evolution was devised is B Interpret numerous observations.
What is the process for the development of a scientific theory?The process for the development of a scientific theory involves making numerous observations that can be used as support and test experiment associated with the assumptions presented in such a theory, which is fundamental to obtaining predictive outcomes.
Therefore, with this data, we can see that the process for the development of a scientific theory is based on observational procedures about a given scientific question,
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Explain how a patient's neurological symptoms may give an indication of where in the brain an injury occurred.
What is a solution's molarity, if its absorbance is 0.4?
The molarity is 0.07 M when the absorbance is 0.4
What is Molarity?Molarity is a unit of concentration that measures the amount of a solute present in a solution in terms of the number of moles of solute per liter of solution. Mathematically, it is defined as the ratio of the number of moles of solute to the volume of the solution in liters:
Molarity (M) = number of moles of solute / volume of solution in liters
In the problem, the plot of absorbance against molarity is attached and the graphed is used to read the molarity when the absorbance is 0.4.
The value from the graph is 0.07 M
complete question is attached
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Sickle cell anemia is a codominant disorder , where AA stands for normal red blood cells and SS stands for sickle- shaped red blood cells . Heterozygous individuals have a phenotype showing both sickle - celled and normal - shaped red blood cells . Cross two people who are both heterozygous for this trait . Show genotypic and phenotypic percentages of the generation
Answer: The genotypic percentages for the offspring of two heterozygous individuals for the sickle cell anemia trait would be 25% AA (normal red blood cells), 50% AS (mixed phenotype), and 25% SS (sickle-shaped red blood cells). The phenotypic percentages for the offspring would be 75% mixed phenotype (AS) and 25% sickle-shaped red blood cells (SS).
Explanation:
Sickle cell anemia is a codominant disorder, which means that both alleles of a heterozygous individual are expressed equally. In this case, the heterozygous phenotype shows a mixture of normal red blood cells (AA) and sickle-shaped red blood cells (SS).
When two heterozygous individuals (AS) are crossed, the possible offspring genotypes are:
AA (normal red blood cells) = 1/4 of the offspring
AS (mixed phenotype) = 1/2 of the offspring
SS (sickle-shaped red blood cells) = 1/4 of the offspring
So, the genotypic percentages for the offspring would be 25% AA (normal red blood cells), 50% AS (mixed phenotype), and 25% SS (sickle-shaped red blood cells).
The phenotypic percentages for the offspring would be 75% mixed phenotype (AS) and 25% sickle-shaped red blood cells (SS), as both alleles are expressed equally in the AS phenotype.
It's important to note that sickle cell anemia is a serious disorder that can cause a wide range of health problems, including anemia, pain, and increased risk of infections. Individuals with sickle cell anemia typically require medical treatment and support to manage their condition.
A species of bird has migrated to an island where their population is growing rapidly due to a lack of predators. Identify three limiting factors to the population size, and describe the effect of each.
Answer:
A species of bird that has migrated to an island where their population is growing rapidly due to a lack of predators may experience the following limiting factors:
Food resources: One limiting factor could be the availability of food resources. If the bird population grows too quickly and consumes all of the available food, the population may be limited by a lack of food. This can result in reduced growth, starvation, and decreased survival rates.Disease: Another limiting factor could be the presence of disease. If a disease outbreak occurs, it could reduce the population size and limit its growth.Breeding habitat: The bird population may also be limited by the availability of suitable breeding habitat. If the island becomes overcrowded, the birds may not have access to enough space to build nests, mate, and rear their young. This could result in decreased breeding success, reduced population growth, and ultimately a decrease in population size.In conclusion, the growth of the bird population on the island may be limited by the availability of food resources, the presence of disease, and the availability of suitable breeding habitat. These factors can have a significant impact on the population size and its ability to sustain itself over time.
Question 4 of 10
How is a scientific theory developed?
O A. An experiment is repeated over and over with the same results.
B. A single experiment is carefully performed once.
C. One scientist supports his or her hypothesis with an experiment.
D. Many different experiments are repeated many times.
A scientific theory is developed by:
D. Many different experiments are repeated many times.What is scientific theoryA scientific theory is a well-substantiated and widely accepted explanation of some aspect of the natural world that is based on empirical evidence and has been repeatedly tested and confirmed through experimentation and observation.
Scientific theories are built upon a foundation of previous scientific knowledge and are subject to ongoing refinement and revision as new data becomes available. They are considered the most robust and comprehensive explanations of natural phenomena that currently exist and provide a framework for understanding how the natural world operates. Examples of well-established scientific theories include the theory of evolution, the theory of gravity, and the theory of relativity.
The development of a scientific theory is a long and rigorous process that involves multiple lines of evidence and repeated experimentation. It typically involves many scientists from different fields and backgrounds working together over a period of years or even decades to collect data and perform experiments that support or contradict a given hypothesis.
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Estimate the probability of this disorder occurring in the offspring of a marriage between first cousins. Enter your answer as either a fraction or a decimal. Part B Compare this probability to the population at large. Inbreeding increases the probability of this disorder. Inbreeding decreases the probability of this disorder. Inbreeding does not change the probability of this disorder.
Part A -The likelihood of having Autosomal Recessive Disorder is 1 in 10,000 people = 0.0001.
Part B - Inbreeding increases the probability of disorder.
Autosomal Recessive Disorder inheritance is the way genetic traits or conditions are passed from parent to child. Genetic conditions can occur when a child inherits a mutated (altered) copy of the gene from each parent. Parents of children with an autosomal recessive disorder usually do not have the disorder. Consanguineous offspring may be at increased risk for recessive diseases due to the expression of autosomal recessive gene mutations inherited from a common ancestor.
The following Genotypes can be found in the first two cousins:
A stands for dominant allele.
a denotes a recessive allele.
1) AA X AA
Normal for all offspring.
There are no problems.
2) AA X Aa
Genotype of offspring = AA and Aa.
Because the phenotype is normal, the condition does not exist.
3) Aa X Aa
Genotype of offspring = AA, Aa, and aa.
The condition affects one-quarter of all offspring.
1/4 are typical,
Half of them are carriers.
4) aa X aa
All offspring are afflicted by the condition.
If we assume the cousins to be carriers[because their genotype is not indicated, we will consider them to be carriers], affected kids are generated.
Carriers' probability = 0.02
By 1/2, both cousins are carriers.
And the likelihood that the child may be impacted - 1/4 or 25%
Total Probability is equal to 1/2 * 0.02 * 1/2 * 0.02
= 0.0001
As a result, the pair might have afflicted offspring by 0.0001.
Possessing the normal alleles has no effect on 25% of people; carrying one impacted and one unaffected allele has no effect on 50% of people. Carrying the afflicted Alleles affects 25% of the population.
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Explain what controls evolution and how these controls affect organisms
Evolution is controlled by a combination of natural selection, genetic drift, gene flow, mutation, and other factors that can influence the frequency and distribution of alleles within a population.
How does evolution come about ?One of the primary mechanisms of evolution is natural selection, which occurs when certain traits provide a selective advantage to an organism in its environment.
Mutation, or changes in the DNA sequence of a gene, can also contribute to evolution by introducing new genetic variation into a population. The controls on evolution can have a significant impact on the traits and characteristics of organisms.
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13. Three resources that rabbits need to survive are: A. Food, oxygen and carbon dioxide. B. Food, water and a mate. C. Water, light and carbon dioxide. D. Oxygen, carbon dioxide and shelter.
Answer:
B
Explanation:
Food and water are basic needs of all animals so rabbits really do need them to survive. Particularly for energy as well as for osmoregulation and all those other reactions that go on inside their bodies. And for the mate, well, rabbits too must make sure their species survive.
NB: Rabbits don't need carbon dioxide to survive.
What process is occurring at Location A?
Combustion
Photosynthesis
Respiration
Weathering
In location A, photosynthesis is taking place. Chlorophyll, which plants use to absorb solar energy and transform it into chemical energy through the process of photosynthesis, gives foliage their characteristic green colour.
Which cycle involves photosynthesis, respiration, combustion, and other processes?The carbon cycle shows how the element carbon naturally moves through the atmosphere in a variety of ways. The photosynthesis, respiration, exchange, sedimentation, extraction, and combustion are the six major steps in the carbon cycle. The majority of these work with CO2, which is a form of carbon [7].
What exactly does photosynthesis entail?Photosynthesis is the mechanism by which plants turn carbon dioxide, water, and sunlight into oxygen and sugar-based energy.
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