The existence of multiple genes that control skin color results in the appearance of many different shades of skin color. Human skin color is a polygenic trait that is controlled by multiple genes. As a result, skin color is highly variable and ranges from very light to very dark.
The genes that control skin color are located on different chromosomes and are inherited from both parents. Therefore, the genes that control skin color can combine in many different ways, resulting in the appearance of many different shades of skin color. The amount and type of melanin in the skin determine skin color. Melanin is a pigment that is produced by special cells called melanocytes. The more melanin a person has, the darker their skin will be. Melanin production is controlled by genes that are located on different chromosomes. Some of these genes control the amount of melanin that is produced, while others control the type of melanin that is produced. Therefore, the combination of these genes determines the amount and type of melanin that is produced, which in turn determines skin color. Multiple gene control polygenic traits of skin color in human.Learn more about polygenic traits: https://brainly.com/question/521134
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An allele that masks the expression of an alternate form of that same gene is called a
An allele that conceals the expression of the same gene's alternative version is Called an epistatic gene.
A recessive allele's masks expression might be concealed by a dominant allele. A dominant allele is one that hides or suppresses other alleles while emerging strongly in the progeny. A recessive allele is one whose effects are muted by the dominant allele and do not manifest in the progeny.
Dominant epistasis, also known as simple epistasis, occurs when a dominant allele at one location conceals the expression of both dominant and recessive alleles at another locus. Recessive epistasis refers to the masking of an expression by a recessive allele. Other genes can be hidden by some.
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Describe in detail the procedure you plan to use to help preserve biodiversity. Make sure to list what materials you will need and what data you will collect.
The goal of the procedure to preserve biodiversity would be to identify and protect areas of high biodiversity value in order to preserve the ecological integrity of the ecosystem and prevent the loss of endangered species.
What procedure can be used to preserve biodiversity?One approach to preserve biodiversity is to create and maintain a database of all known species in a particular ecosystem. This can help identify which species are endangered or at risk of extinction, as well as areas of high species diversity that may require protection.
To create such a database, one would need to:
Collect data on the species present in the ecosystemCatalog this data in a centralized database that can be accessed by researchers and conservationistsUse this database to identify areas of high conservation valueImplement conservation measures to protect these areas, such as establishing protected areas, limiting human activity in sensitive habitats, and reintroducing endangered species into the wild.Materials needed for this procedure may include field survey equipment such as cameras, binoculars, and GPS devices, as well as data management software and tools for data analysis.
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90 POINTS BIOLOGY. theres pedigree worksheet in the screenshots bellow please help and fill out the ws in a answer
A family tree is a chart that depicts family ties in a typical tree form. It is also known as a genealogy or a pedigree chart. Genograms are extended family trees that are employed in social work and medicine.
How does a family tree compare to a pedigree?A pedigree chart begins with you and traces your line of ancestors back to them. A family tree, lineage, or ancestry chart are other names for it. Consider the pedigree chart as a comprehensive overview of your ancestry in concise form. You can detect the gaps in the data you are getting with just a fast glance at it.
Direct ancestors are the only ones highlighted in the horizontally oriented pedigree view, which places descendants on the left and ancestors on the right.
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How would the absence of enzymes impact digestion
Answer:
When the pancreas doesn't naturally secrete digestive enzymes, it affects your body's ability to break down the foods you eat and absorb nutrients. This can lead to malnutrition as well symptoms such as bloating, cramping, gassiness, and diarrhea.
Explanation:
(a) Christina wants to increase the number of eggs per year by using selective breeding.
(i)Which two chickens should she breed together?
(ii) Christina chooses chickens to breed from the offspring.
Which ones should she choose?
Simple is a good word to describe the fundamental approach. It is likely that her daughters will likewise be effective layers if you breed from the hen that produces the most eggs. This is so because a hen's genes, which she gets from her parents, play a factor in determining how many eggs she lays.
How did chickens raised for meat become a product of selective breeding?Increased growth rate and higher meat output were the primary objectives of selective breeding in meat chickens in the 1960s (i.e. producing larger chickens in less time). These days, the strategy is much more balanced, with health and wellbeing of the breeding animals playing a key role.
Inbreeding, linebreeding, and outcrossing are methods used in animal breeding.
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A group of individuals that can interbreed in nature and produce viable offspring would be considered to be a species according to the A. phylogenetic species concept. B. biological species concept. C. evolutionary species concept. D. ecological species concept. E. general lineage concept
A group of individuals that can interbreed in nature and produce viable offspring would be considered to be a species according to the B. biological species concept.
The biological species concept defines a species as a group of organisms that can interbreed and produce viable offspring under natural conditions but are reproductively isolated from other such groups. In other words, individuals of the same species are able to mate with one another and produce fertile offspring, but they cannot mate with individuals of other species to produce viable offspring.
This concept is based on the idea that a species is a group of organisms that share a common gene pool and are capable of interbreeding to produce fertile offspring. It is one of the most widely accepted definitions of a species among biologists.
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sound reaches our ears because sound makes air particles ________________.
Answer:
vibrate
Explanation:
which type of food molecule provides components for cellular structures like plasma membranes, myelin sheaths, and steroid hormones? which type of food molecule provides components for cellular structures like plasma membranes, myelin sheaths, and steroid hormones? glucose complex carbohydrates protein lipids
Lipids provide components for cellular structures like plasma membranes, myelin sheaths, as well as steroid hormones. Option B is correct.
Lipids are a diverse group of biomolecules that are insoluble in water and soluble in organic solvents. They include fats, oils, phospholipids, and steroids. Lipids serve many important functions in the body, such as providing a source of energy, serving as a structural component of cell membranes, and acting as signaling molecules.
Phospholipids, a type of lipid, are major components of plasma membranes that form a lipid bilayer. Steroid hormones, another type of lipid, are derived from cholesterol and are involved in a variety of physiological processes, including growth and development, stress response, and reproductive functions. Myelin sheaths, which insulate nerve fibers, are composed of a type of lipid called sphingomyelin.
While proteins and complex carbohydrates are also important components of cellular structures, lipids are the primary type of molecule that provides components for structures like plasma membranes, myelin sheaths, and steroid hormones.
Hence, B. lipids is the correct option.
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--The given question is incorrect, the correct question is
"Which type of food molecule provides components for cellular structures like plasma membranes, myelin sheaths, and steroid hormones? A) protein B) lipids C) complex carbohydrates D) glucose."--
Which of the following is not a fluid. A. Hydrogen gas. B.molten iron. C. Helium plasma. D.all the above are fluids
Answer:
The correct answer is A. Hydrogen gas.
Explanation:
Hydrogen gas is not a fluid because it is a gas and gases do not have a definite shape or volume. A fluid is a substance that can flow and take the shape of its container. Molten iron and helium plasma are fluids because they can flow and take the shape of their container.
we are isolating dna from a martian. their dna turns out to be very very tiny, so we will use a very dense agarose gel to analyze the dna. so, instead of the 1% agarose gels that we normally would use in lab, you are tasked with making a 6% agarose gel. the total volume of gel you need to make is 90 ml. how many grams of agarose will you use for this
To make a 6% agarose gel with a total volume of 90 ml, 5.4 grams of agarose is needed.
The agarose gel to analyze the Martian's DNA will need to be denser than the usual one, as the DNA is very tiny. The 1% agarose gels will be replaced with a 6% agarose gel. The total volume of gel required is 90 ml.
To find the amount of agarose required, we need to use the following formula:
Amount of agarose (in grams) = Percentage of agarose / 100 * Total volume of gel
Amount of agarose = 6 / 100 * 90
Amount of agarose = 5.4 grams
Therefore, we would require 5.4 grams of agarose to make a 6% agarose gel of 90 ml.
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Because primates are so diverse and show so much behavior flexibility, very few primate species are threatened of extinction - True - False
The given statement "Because primates are so diverse and show so much behavior flexibility, very few primate species are threatened of extinction" is false.
Many primate species are threatened with extinction due to habitat loss, hunting, and other factors. According to the International Union for Conservation of Nature (IUCN), approximately 60% of primate species are currently threatened with extinction, and another 30% are considered to be at risk of becoming threatened in the near future.
The primary threats to primate populations include habitat destruction, fragmentation, and degradation, as well as hunting, poaching, and the illegal trade in wildlife. Climate change is also becoming an increasingly significant threat to many primate species.
Therefore, while primates are indeed diverse and show a great deal of behavioral flexibility, many species are in danger of disappearing from the planet.
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What are the small leaves of a flower called?
Answer: Sepals
Explanation: They’re the small leaves in the base of the flower.
acetylcholinesterase is an important enzyme in the nervous system. acetylcholinesterase activity is blocked by the nerve agent sarin gas, which forms a covalent bond with a ser in the active site of the enzyme. sarin gas is a(n) .
Acetylcholinesterase is an important enzyme in the nervous system. It plays a role in the transmission of nerve impulses by catalyzing the hydrolysis of the neurotransmitter acetylcholine. Acetylcholinesterase activity is blocked by the nerve agent sarin gas, which forms a covalent bond with a serine residue in the active site of the enzyme. Sarin gas is a potent chemical weapon that can have serious health effects.
Sarin gas is a potent nerve agent that works by inhibiting the activity of the acetylcholinesterase enzyme. Sarin gas is classified as a chemical warfare agent, and it belongs to a class of compounds known as organophosphates. Sarin gas works by irreversibly binding to the active site of the acetylcholinesterase enzyme, which prevents the breakdown of the neurotransmitter acetylcholine.
As a result, acetylcholine accumulates in the synaptic cleft and overstimulates the nervous system, leading to respiratory failure and death if left untreated. Sarin gas is highly toxic and can cause severe health effects even at very low concentrations.
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Coyotes are predators of rabbits, and rabbits eat grass. An ecosystem experiences an increase in the size of its rabbit population. Which change will help the ecosystem maintain homeostasis?
Answer:
Explanation:
An increase in the rabbit population can result in an increase in the coyote population since coyotes prey on rabbits. This increase in the coyote population can then lead to a decrease in the rabbit population as they become preyed upon.
To maintain homeostasis in the ecosystem, one change that can help is the introduction of a predator of the coyote population. This can help control the number of coyotes and reduce the pressure on the rabbit population.
Another change that can help maintain homeostasis is the introduction of a new food source for the coyotes. This can reduce their dependence on rabbits and lower the pressure on the rabbit population.
Alternatively, the ecosystem may adapt naturally over time by altering the dynamics between coyotes and rabbits, such as increasing the rabbit's ability to evade predators or reducing the coyote's population through other means like disease or natural disasters. However, such changes may take longer to occur and may not always result in a balanced ecosystem.
When the economy is growing , total output is__ and total income is ___
A. Increasing, Decreasing
B. Increasing, increasing
C. Decreasing, Decreasing
Answer: The answer is B.
Explanation:
Polar bears hunt seals through the ice in North Atlantic. Is this a competitive interaction, Predator, or Mutual?
a key role of psi is to produce high-energy electrons that are used to make
The production of high-energy electrons by Psi plays a crucial role in photosynthesis, providing the energy necessary for the synthesis of ATP and NADPH, which are essential for the survival of plant cells.
Psi (Photosystem I) is a photosynthetic protein complex found in the thylakoid membranes of chloroplasts in plant cells. One of its key roles is to produce high-energy electrons that are used to make ATP (adenosine triphosphate), the primary energy currency of cells, and NADPH (nicotinamide adenine dinucleotide phosphate), an electron carrier molecule that is used in various metabolic processes.
In photosynthesis, light energy is absorbed by pigments called chlorophylls, which are located in the thylakoid membranes of the chloroplasts. This light energy is then converted into chemical energy in the form of high-energy electrons, which are passed through a series of electron carriers, including the Psi complex.
When light energy is absorbed by chlorophylls in the Psi complex, it excites electrons to a higher energy state, which are then transferred to an electron acceptor called ferredoxin. These high-energy electrons are then used to reduce NADP+ to NADPH, which can be used in various metabolic processes such as the synthesis of carbohydrates.
In addition, the movement of these high-energy electrons through the electron transport chain in the thylakoid membrane generates a proton gradient, which is used to drive ATP synthesis through a process called photophosphorylation.
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What are the 3 leading causes of death in adolescence?
The three leading causes of death in adolescence (defined as ages 15-19 years) vary by region, but globally they are:
Accidents (unintentional injuries)Homicide.FirearmsAdolescence is the stage of development between childhood and adulthood. It is characterized by physical, cognitive, and emotional changes that occur as a result of hormonal and neural changes in the body. During adolescence, individuals experience a significant growth spurt, which is marked by an increase in height, weight, and muscle mass. Secondary sexual characteristics such as pubic hair growth, breast development, and the onset of menstruation also occur during this time.
Emotionally, adolescence can be a tumultuous time as individuals grapple with a range of intense feelings, including mood swings, anxiety, and depression. Adolescents are also more likely to take risks and engage in impulsive behavior, which can have both positive and negative consequences. Overall, adolescence is a crucial period of growth and development that shapes individuals' physical, cognitive, and emotional development.
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If the frequency of p2 equals 0.49, what is the value of q?
Responses
0.009
0.009
0.3
0.3,
0.7
0.7
1
Answer: q = 0.3
Explanation: According to hardy weinberg principal
p + q =1
p^2=0.49
hence, p=0.7
therefore q= 1-0.7
q=0.3
Which scientists provided definitive evidence that DNA is the transforming factor?
Alfred Hershey and Martha Chase
Alfred Hershey and Martha Chase are scientists provided definitive evidence that DNA is the transforming factor.
The genetic material that carries and transmits hereditary information in living beings is DNA, according to a series of studies carried out by Alfred Hershey and Martha Chase in the 1950s.
Hershey and Chase employed bacteriophages, which are viruses that infect bacteria, in their investigations. They concentrated on the T2 bacteriophage, which has a DNA core and a protein coat.
Hershey and Chase employed a method known as radioisotope labeling to ascertain whether the T2 bacteriophage's DNA or protein component was in charge of carrying genetic information. One set of T2 bacteriophages' protein coat was radioactively labeled with sulfur, while another group's DNA core was radioactively labeled with phosphorus.
After infecting the bacteria with virus then it was found that DNA is the genetic material.
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what is the hybridization of the carbon attached to three hydrogens in acetic acid?
The carbon attached to three hydrogens in acetic acid (CH3COOH) is sp2 hybridized.
In acetic acid, the carbon atom is covalently bonded to two oxygen atoms and one hydrogen atom. The carbon atom forms a double bond with one oxygen atom and a single bond with the other oxygen atom, and it also has a lone pair of electrons.
To accommodate these bonding arrangements, the carbon atom undergoes sp2 hybridization, which means that it combines one s orbital and two p orbitals to form three sp2 hybrid orbitals that are arranged in a trigonal planar geometry. The remaining p orbital is used to form the double bond with one of the oxygen atoms.
Therefore, sp2 hybridization of the carbon attached to three hydrogens in acetic acid.
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Imagine that you are a seed. You have been planted on the side of a hill. At the bottom of the hill is a stream. There are many forms of plant life around you which are
competing for sunlight. Write a story about how you are going to grow so that you can get all the sunlight, water, nutrients, and Carbon Dioxide that you will need. In
your story, be sure to include the following terms: geotropism, hydrotropism, and phototropism
The story should be interesting. Eight decent sentences should do
When a seed is planted in the soil upside down, the stem grows upward and away from the Earth, while the roots develop downward towards the earth. Therefore, if a root is inserted inverted in the soil.
What it will happen if indeed the seeds are placed in the ground?First, seeds develop roots when they are planted. When these roots gain traction, a little plant may begin to form and start breaking through the dirt. This procedure is known as germination in scientific terms.
What is an illustration of a plant moving towards the light?Phototropism. Plants tend to slant towards the light, as you may have seen. This is an illustration of a phototropism, a tropism in which light serves as the stimulus (Figure below). Stems and leaves incline towards the light as a means of obtaining more light for photosynthesis.
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The seven bones of the neck are called _____ vertebrae.
(a) lumbar
(b) spinal
(c) thoracic
(d) cervical.
The seven bones of the neck are called cervical vertebrae. The correct option is option (d) cervical.
Cervical vertebrae are the seven vertebrae that make up the spine in the neck region of mammals. It is abbreviated as C1-C7. They are the smallest of the true vertebrae and are considered as the topmost region of the vertebral column.
They are one of the most flexible regions of the vertebral column, allowing for lateral, forward, and backward movement of the head. The seven bones of the neck are called cervical vertebrae.
The cervical spine has seven vertebrae, all of which are small in size. Between each vertebra, there are intervertebral disks that cushion and dampen the shock of the movement. The spinal cord runs through the middle of the spinal canal, which is formed by the vertebral foramen of the seven cervical vertebrae.
Vertebrae are a series of bony rings stacked on top of one other that make up the backbone of vertebrates. It protects the spinal cord and helps to support the weight of the head, arms, and torso.
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in seedless plants, a multicellular organ where meiosis occurs and haploid cells develop. it is called____
in seedless plants, a multicellular organ where meiosis occurs and haploid cells develop. it is called gametophyte.
In plants and algae, a gametophyte is a multicellular haploid organism that generates gametes (sex cells). The gametophyte is the stage in a plant's life cycle that emerges from a spore and is haploid, meaning it has one pair of chromosomes.
Gametogenesis is the process by which the gametophyte produces the gametes, which can either be sperm or eggs. In the process of fertilization, the gametes from the gametophyte combine to create a diploid zygote, which grows into a sporophyte, the following stage in the life cycle of plants.
The gametophyte, which is a leafy, photosynthetic plant body, is some plants' primary life stage. Mosses are an example of such a plant. The gametophyte is a smaller, less noticeable structure in other plants, like ferns, and it receives its nutrition from the sporophyte.
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Question 7
Some of your biggest and most powerful muscles are:
In your calves and thighs
In your fingers
In your back near your spine
In your arms
Answer:
in your calves and thighs
Explain how shifts in weather patterns (changes in circulation of atmosphere and oceans) produce the El Nino & La Nina phenomena.
In which phase of bone remodeling do osteocytes attract pre-osteoclasts?
A Formation
B Resting
C Resorption
D Reversal
E Activation
The correct answer is E - Activation.
Answer:
i believe the answer is E.
Explanation:
pre osteoclasts are attracted to the remodeling sites.
pre-osteoclasts join to form multinucleate osteoclasts.
sherpath which factors allow for the exchange of nutrients and waste products between maternal and fetal blood without the physical mixing of their blood?
The factors that allow for the exchange of nutrients and waste products between maternal and fetal blood without the physical mixing of their blood are the placenta and umbilical cord.
What is a placenta?The placenta is a specialized organ in the female body that forms during pregnancy. It provides nutrients to the developing fetus and helps with the excretion of waste. The placenta serves as a barrier between maternal and fetal blood supplies, allowing for the exchange of nutrients and waste products without mixing the blood. The placenta filters out waste products and prevents harmful substances from passing through.
What is an umbilical cord?The umbilical cord is the structure that connects the fetus to the placenta. It contains two arteries and one vein that transport blood between the fetus and the placenta. The umbilical cord helps to provide the fetus with oxygen and nutrients while removing waste products. The umbilical cord also serves as a barrier between maternal and fetal blood, preventing the mixing of blood.
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The process by which water vapor passes through stomata from plants to the atmosphere is called
The process by which water vapor passes through stomata from plants to the atmosphere is called transpiration.
Transpiration is a natural process by which plants release excess water vapor through their stomata, which are small pores on the surface of leaves. These pores allow for the exchange of gases between the plant and the environment. During photosynthesis, plants absorb water from the soil through their roots and transport it to their leaves. The excess water is then released into the atmosphere through transpiration. Transpiration is an important part of the water cycle, as it contributes to the movement of water from the land to the atmosphere.
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which of the following is true of the cardiorespiratory system? group of answer choices arteries only provide oxygen to the heart muscle. the lungs pump blood around the body. arteries carry oxygenated blood back to the heart. blood in veins has less oxygen than blood in arteries.
Low oxygen blood is carried by pulmonary arteries. In order to oxygenate the blood, the pulmonary arteries transport oxygen-poor blood from the right ventricle to the lungs.
What functions does the cardiorespiratory system perform?Your body's cells utilise oxygen, nutrients, and hormones carried by the circulatory system, also known as the cardiovascular system or vascular system, for energy, growth, and repair. Moreover, the circulatory system eliminates wastes that your cells don't require, such as carbon dioxide.
The cardiovascular system does not include which of the following?Big intestine is the appropriate response. The circulatory system does not include the large intestine.
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