The two processes unique to meiosis that are responsible for genetic variation are crossing over and random distribution of genes. They occur in prophase I and metaphase I of meiosis I.
When identical chromosomes are paired together during meiosis, a biological event called crossing over takes place. A chromosome's structure can change if two of its chromosomes, one from the mother and one from the father, line up. Even when identical genes are present on the two chromosomes, they could be expressed in different ways. Because of this it promotes genetic reassortment and ensures genetic variation. And this takes place during prophase I of Meiosis I.
According to the law of independent assortment, gametes typically randomly distribute each gene from a pair of homologous chromosomes. All possible combinations appear as a result of equal frequency. This random alignment of homologs that occurs in metaphase I determine the separation arrangement.
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Choose the statement that best exemplifies the interrelated nature of anatomy and physiology Multiple Choice O Simple squamous epithelium consists of a single layer of flattened cells, which is appropriate for organs where filtration and diffusion occur. O The stomach is involved in mechanical and chemical digestion, and secretes many enzymes as well as hormones. O The Iris of the eye consists of two layers of smooth muscle innervated by the autonomic nervous system. O The ovaries are involved in the production of gametes as well as production of hormones that regulate the menstrual cycle.
The statement that exemplifies the interrelated nature of anatomy and physiology is, Simple squamous epithelium consists of a single layer of flattened cells, which is appropriate for organs where filtration and diffusion occur. Correct answer: letter A.
Simple squamous epithelium is a type of tissue consisting of one layer of flattened cells, which is highly permeable and allows for efficient filtration and diffusion of molecules and other particles.
It is found in organs such as the lungs, kidneys, and small intestine, where it plays an important role in gas exchange, fluid balance, and nutrient absorption. Simple squamous epithelium is also found in other organs, such as the heart and reproductive organs, where it helps to protect underlying structures, regulate the passage of substances, and provide lubrication.
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at what age will the five bones of the sacrum start fusing together
The sacrum is composed of five fused sacral vertebrae bones. The five bones of the sacrum start fusing together at the age of 18-25 years.
The human vertebrae column consists of 33 vertebrae. The vertebrae coloumn, also known as spine, contain sacrum that is made up of 5 fused vertebrae bones. The five bones of the sacrum form a triangular structure.
Sacrum can be found between the 2 hipbones and it connects the vertebrae column to the pelvis. At late adolencent, the five sacrum bones start fusing and provide structural support and flexibility to the hips and pelvis.
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There are two main types of life cycles that viruses go through. List those life cycles.
a)
b)
Answer:
the lytic cycle and lysogenic cycle.
Explanation:
have great day
1.
How many different kinds of coin were available in old Italy?
Around 90 different coin kinds were in use in Italy in 1859, creating a financial mess that was only resolved after the country was united. Consequently, establishing a currency union for the emerging business region was of utmost importance.
Italy's previous currency was the lira.The florin served as the benchmark for coinage throughout Europe and evolved into the preferred trade coin that was more valuable than silver. By introducing their own currencies, many European countries started to adopt the florin as their model. The Italian lira replaced the florin as the country's currency in the sixteenth century.
What currency do you believe to be the oldest?Stator of Lydia The World's Oldest Coin. Various academics contend that the Lydian stater is regarded as the oldest coin remaining in existence. These ancient coins, known as electrum, were produced in the country of Lydia, in what is now modern day Turkey, circa 600 BCE.
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The decomposition of dimethylether at 504 oc is first order with a half-life of 1570 seconds. What fraction of an initial amount of dimethylether remains after 4710 seconds?.
The fraction of an initial amount of dimethylether remains after 4710 seconds is 1/8.
Given the decomposition of dimethylether at 504oc is first order.
The half-life (t) = 1570 seconds.
A radioactive isotope's half-life is the length of time it takes for one half of it to decay. The half-life of a particular radioactive isotope is not influenced by the environment and is not dependent on the isotope's initial concentration.
Time taken (t1) = 4710 seconds.
Therefore, the fraction of an initial amount of dimethylether that remains after 4710 seconds will be: 1/2^n where n = t1/t such that:
n = 4710/1570 = 3.
Then the required fraction = 1/2^3 = 1/8.
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What is the percent yield if 18 grams of water are produced when 4 grams of hydrogen with excess oxygen?.
The percent yield if 18 grams of water are produced when 4 grams of hydrogen with excess oxygen is the percent yield is 450%.
What is [tex]H_{2} O[/tex]?[tex]H_{2} O[/tex] is an open source machine learning platform created by the company [tex]H_{2} O[/tex]. It is used by data scientists, analysts, and developers to build and deploy machine learning models. It offers a variety of powerful tools for data preparation, modeling, and deployment, as well as a range of algorithms for supervised and unsupervised learning.
In the given question, the percent yield can be calculated by dividing the amount of water produced (18 g) by the amount of reactant that was used (4 g). This gives us an answer of 4.5, which can be expressed as a percent yield of 450%.
The percent yield is an expression of the efficiency of a reaction. It is calculated by dividing the amount of product actually produced by the amount of product that should have been produced (based on the stoichiometric ratio). In this case, the reaction of 4 g of hydrogen with excess oxygen should have produced 18 g of water. Since 18 g of water were actually produced, the percent yield is 100%. This means that the reaction was 100% efficient and all of the reactants were used up in the reaction.
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darwin’s theory regarding the origin of bipedalism was ultimately accepted and remains central to our thinking about human evolution today. t or f
True. Darwin’s theory regarding the origin of bipedalism was ultimately accepted and remains central to our thinking about human evolution today.
What do you mean by Bipedalism?
Bipedalism is the ability of an organism to move using only two limbs, usually the legs. It is a form of locomotion used by most humans and some other animals, such as apes and birds. Bipedalism increases the range and speed of movement, as well as providing better balance and stability.
Darwin’s theory of the origin of bipedalism explains that the upright posture of humans evolved as an adaptation to the changing environment of the African savanna. According to Darwin, a bipedal posture allowed for the freeing of the hands, increasing the efficiency of foraging and tool-making. This theory has been widely accepted as the most plausible explanation for the emergence of bipedalism, as it is supported by the fossil record and other evidence. The theory has become central to our understanding of human evolution, as it has been confirmed by numerous archaeological discoveries and is supported by the current scientific consensus.
Hence, the statement is True.
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Why nervous system is the most important organ system?.
Answer:
Check explanation
Explanation:
The nervous system plays a role in nearly every aspect of our health and well-being. It guides everyday activities such as waking up; automatic activities such as breathing; and complex processes such as thinking, reading, remembering, and feeling emotions. The nervous system controls: Brain growth and development.
cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. if cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space. what does this experiment show?
cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. if cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space. this experiment show The controls on cell growth and divisions can be turned on and off.
In a petri dish, cells are cultured with a propensity to multiply until a thin layer covers the dish's bottom. The cells bordering the empty space will start to divide once the cells in the dish's middle are removed, eventually filling the space. Cell division is the process by which unicellular creatures reproduce, whereas in multicellular organisms, it is the process by which tissues grow and are maintained. It is crucial to maintain a balanced distribution of cell types because interactions between various cell types are vital for the survival of eukaryotes. Cell growth, a well controlled process, enables this. Although various cell populations have varied systems for controlling their growth and division, multicellular organisms often share the same fundamental principles.
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during which phase of mitosis do the nuclear envelope and nucleoli disappear?
During Prophase of mitosis do the nuclear envelope and nucleoli disappear .
A cell divides into two genetically identical daughter cells during the process of mitosis, which is also known as cell duplication or reproduction. When used strictly, the term "mitosis" refers to the duplication and dispersion of chromosomes, the biological units that house genetic material.The cell begins to demolish certain structures and erect others in early prophase, preparing the way for chromosomal division.Beginning to condense are the chromosomes (making them easier to pull apart later on).The mitotic spindle starts to take shape. The "skeleton" of the cell, or microtubules, are strong fibers that make up the spindle. Its function during mitosis is to arrange and move the chromosomes. As the centrosomes separate, the spindle expands in their space.
complete question:During which phase of mitosis do the nuclear envelope and nucleoli disappear?
A: Metaphase B: Prophase C: Telophase D: Anaphase
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What are the major points in the theory of natural selection?.
There are five main points to be considered during natural selection. They are variation, adaptation, selection, inheritance, and time.
Populations of living creatures fluctuate over time due to a fundamental mechanism called natural selection. It is so straightforward that it can be divided into five simple processes, referred to here as VISTA (variation, inheritance, selection, time, and adaptation).
Variation: Individuals in a population are different from one another because they have different genetic makes up than other individuals. This is true for all species.Inheritance: Some of a parent's genetic makeup is transferred to their children.Selection: Some people have inherited traits (genes) that help them live longer or have more children. These offspring have a higher likelihood of surviving and having children of their own. Their genes spread throughout the entire population as a result.Time: Selection leads to changes in species throughout time. Successful variants build up throughout time as these changes happen over days, decades, or even millions of years.Adaptation: The change of an organism to its environment to increase its chances of survival is known as an evolutionary adaptation or adaptation.To know more about natural selection:
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a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.______
The term "thread-like structure of nucleic acids and protein found in the nucleus of most living cells" is used to describe chromosomes.
What are genes?A gene is a section of DNA that carries instructions for a particular protein or RNA molecule's creation. Most of a cell's tasks are carried out by proteins and RNA molecules.
How does chromosomes helps in conveying genetic information?Chromosomes are described as a "thread-like structure of nucleic acids and protein found in the nucleus of most live cells, conveying genetic information in the form of genes." In the form of genes, chromosomes are objects that can be found in the nucleus of living things. They are composed of DNA, a lengthy, double-stranded molecule, and histone proteins, which aid in packaging and organising the DNA. Most eukaryotic species have two sets of chromosomes in each cell, one set inherited from each parent. The number and form of chromosomes vary among different organisms. The genetic material on these chromosomes defines an organism's traits and characteristics.
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What is a shared property
between surfaces that
transmit?
A shared property between surfaces that transmit is their ability to allow the passage of energy or matter (such as light, sound, heat, electricity, etc.) from one side to the other.
What is transmit?Transmit is the act of sending a signal, message, or data from one point to another. It is a term used in telecommunications and information technology to refer to the act of sending and receiving information such as audio, video, text and data files over a communication channel. Transmit is used to facilitate communications and can include both wireless and wired connections.
This is due to the fact that all surfaces which transmit have a certain degree of permeability, which allows them to absorb and transmit energy or matter from one side to the other.
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1. Most sharks have a low reproductive potential which of the following factors might contribute to this?
A. Long reproductive cycles (long period. Of time between mating cycles).
B. Slow growth and delayed maturation.
C. Small brood (amount of young) sizes.
D. All of the above
2. Which of the following may cause the carrying capacity of an ecosystem to change ?
A. A dam diverts a large portion of the river
B. A logging company removed acres of trees.
C. A disease come through and wipes out 80% of the wild berries.
D. All of the above.
3. Which of the following would not be the most likely cause of a large number of density-dependent deaths in population?
A. Winter storms.
B. Diseases-carrying insects
C. Predators
D. Limited resources
4. Infant mortality rates are least affected by
A. Average income
B. Patients access to education
C. Clean water
D. Adequate food
Answer:
1. B-slow growth and delayed maturation
2.D-all of the above
3.A-winter storms
4.D-Adequate Food
Why doe the cience of ynthetic biology till need to adhere to the
principle of the urface-area-to-volume ratio?
The time it takes for things to diffuse increases as the ratio decreases.
In synthetic biology, biological processes and cells are broken down and put back together to create new systems that perform useful functions. Deoxyribonucleic acid (DNA) encodes designs; DNA creates biological (bio-)parts; bioparts are assembled to create devices; gadgets are integrated into biological systems.
Volume grows more quickly than surface area as a cell gets bigger because volume is squared but surface area is squares.
Diffusion takes longer and is less efficient when there is more volume and less surface area. This is due to the fact that a larger region must receive the material that is being dispersed, but that there is a smaller area available for the chemical to actually enter the cell.
Cells actually divide for this reason. They lose efficiency and split in half to increase the surface area to volume ratio when they grow too big and take too long to transfer materials across the cell.
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Why did Mendel choose pea plant for his experiments give 4 Reasons Class 10?.
The advantages of pea plants and the reasons Gregor Mendel thought they were perfect for his experiments were as follows:
They were simple to grow and grew quickly .Their traits are easy to identify .They have seven different traits that can be observed. There are various types of peas that can be crossed or hybridized. Convenience in the long run because pea plants require little care and take up little room.The garden pea is a perfect topic for the study of genetics for the following reasons, which is why Gregor Mendel picked pea plants for his experiments: existence of distinguishable features in different forms. In one cross, numerous children are produced. brief life cycle Pollination manipulation is simple (cross pollination).
Because of his genetic experiment with the pea, Mendel is regarded as the father of modern genetics (Pisum Sativum).
Because the petals cover the reproductive organs until fertilization, pea plants normally self-fertilize. It is simple to obtain the pure line of pea plants with a consistent trait thanks to the self fertilization over many generations.
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Check all statements below that are true
All organisms must compete for survival
Statements true according to law of natural selection are:
Some organisms have phenotypes that make them better competitors than others in their environment.Animals undergo natural selection, but plants and other organisms generally do not.Natural selection continues to occur even today.Phenotypes found in the most successful members of a species become the most prevalent after several generations.A decrease in food availability will increase the variation in a population.What is Natural selection?Natural selection is the process by which certain traits become more or less common in a population over time as a result of differential survival and reproduction of individuals with those traits.
It is a key mechanism of evolution and is based on the principles of variation in traits among individuals in a population, heritability of traits, and differential reproductive success of individuals with certain traits. Through natural selection, traits that provide an advantage in survival and reproduction become more common in the population, while traits that are detrimental become less common.
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The complete question is:
Check all statements below that are true.
All organisms must compete for survival.
When organisms struggle to survive, they usually mutate to increase chances of reproduction.
Some organisms have phenotypes that make them better competitors than others in their environment.
Animals undergo natural selection, but plants and other organisms generally do not.
Natural selection continues to occur even today.
Phenotypes found in the most successful members of a species become the most prevalent after several generations.
A decrease in food availability will increase the variation in a population.
what is the name of the canal that connects osteons to other osteons?
A central canal known as the osteonic (haversian) canal and concentric rings (lamellae) of the matrix make up the osteon. Volkmann's-canals, also known as perforating canals, connect osteons to the periosteum and to each other.
The osteon, the primary structural element of compact (cortical) bone, which is composed of concentric bone layers known as lamellae, surrounds the Haversian canal. Small blood arteries in the Haversian canal provide blood to osteocytes, or individual bone cells. Osteons are 0.2 millimeters in diameter and several millimeters long; they typically run parallel to the long axis of a bone. Osteons are structures that are specific to mature bone that take shape during the process of bone remodeling, or regeneration.
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Matching. _____ is evolution within a _______ , while _______ is the _____ of one type of organism to another type of organism.
word bank:
organism
species
change
Preservation
macroevolution
herd
Microevolution
Answer:
__Microevolution___ is evolution within a ___species____ , while __macroevolution_____ is the _change____ of one type of organism to another type of organism.
Explanation:
Hope it helps:)
Answer:
Microevolution is evolution within a species, while macroevolution is the change of one type of organism to another type of organism.
Place the following compounds in order of increasing strength of intermolecular forces.
Consequently, the intermolecular forces strength increases in the order as follows: CH4<CH3CH3<CH3CH2CH3.
The boiling point of an alkane molecule will increase with its mass. As more heat is needed to dissolve the connections between atoms, this indicates that forces of attraction will be stronger when mass is greater. So, the boiling point is higher. The interaction between molecules (intermolecular forces) is a delicate balancing act between the attraction of a molecule's nucleus to nearby electrons and the repulsion of its outside electrons. As a result, the provided molecules have a mass of 16.04 g/mol for CH4, 44 g/mol for CH3CH2CH3, and 30 g/mol for CH3CH3. Thus, it is clear that CH4 has the least mass while CH3CH2CH3 has the highest mass.
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complete question: Place the following compounds in order of increasing strength of intermolecular forces. (A)Ch4 (B)ch3ch2ch3 (C)ch3ch3
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What animals don't feel pain?.
Jellyfish and other cnidarians (such as coral and sea anemones) are believed to have a limited ability to feel pain due to their simple nervous system.
Similarly, some species of fish and amphibians may have a limited ability to feel pain.
It is difficult to say which animals do not feel pain as pain perception is a complex process that varies between different species. However, some species are known to have a relatively low pain threshold or limited ability to feel pain.
Additionally, some insects, like honeybees, have been observed to not show any signs of pain after losing a limb, although the research on this topic is still ongoing, and it is not fully understood yet.
It is important to note that all animals have evolved different mechanisms to protect themselves from injury and that pain serves as an important protective mechanism in most animals, so it's hard to find an animal that does not feel pain.
It's also important to note that the ability to feel pain is not the same as the ability to suffer, animals that can't feel pain may still suffer, and we should respect their lives and well-being too.
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The current at different positions in a series circuit before and after the bulb will
always
A. Be variable
B. Be the same.
C. Show an increase.
D. Show a decrease.
The current at different positions in a series circuit before and after the bulb will always be the same. Correct answer: letter B.
This is because in a series circuit, the same amount of current flows through each component. This means that the current before the bulb will be the same as the current after the bulb.
This means that the current through the entire circuit is the same and will not be affected by the resistance of any one component. This is due to the fact that the total resistance of the circuit is equal to the sum of the individual resistances of the components. As a result, the current through each component of the circuit will be the same as the current through the entire circuit.
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Why wa the ue of Biotechnology neceary concerning the creation of a new vaccine for Hepatiti B?
The use of biotechnology necessary concerning the creation of new vaccine for Hepatitis B is the expectations of public health benefit for low- and middle-income countries with the needs for commercial profitability on the one hand.
A significant turning point in the development of biotechnology and the system for vaccine creation was the licensure of a number of recombinant hepatitis B vaccines starting in 1986. In this paper, we demonstrate how a political and economic environment that newly encouraged the commercialization of scholarly research, including the appropriation and management of intellectual property, shaped the early development of the hepatitis B vaccines. We also clarify the varying interests and drivers that encouraged new biotechnology companies and established pharmaceutical businesses to invest in developing recombinant vaccines specifically against hepatitis B.
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9. What is not a result of cholera infection?
A. intestinal blockage
B. loss of salts from blood
C. severe dehydration of body tissues
D. severe diarrhoea
Answer:
A. intestinal blockage
Explanation:
Answer: A. intestinal blockage
Explanation: Cholera is an infectious disease caused by the bacterium Vibrio cholerae. It primarily affects the intestines and leads to severe diarrhea. This can result in the loss of significant amounts of fluid and electrolytes from the body.
Intestinal blockage refers to the obstruction or partial blockage of the intestines, which can be caused by various factors such as a physical obstruction or inflammation but not by cholera.
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the green color of a plant comes from which pigment
Chlorophyll, the green pigment in leaves, absorbs the red and blue wavelengths of sunlight. As a result, the light that the leaves reflect has less red and blue in it and appears green instead.
What do you mean by chlorophyll?Any of several closely similar green pigments called chlorophyll can be found in cyanobacteria as well as in the chloroplasts of algae and plants. Plants can absorb energy from light thanks to chlorophyll. In the blue and red parts of the electromagnetic spectrum, chlorophylls absorb light most effectively. On the other hand, it exhibits low absorption in the green and near-green regions of the spectrum. Because cell walls and other structures diffusively reflect green light, tissues that contain chlorophyll appear green as a result. The photosystems of green plants contain two different forms of chlorophyll: chlorophyll a and b.
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Why is artificial selection not a successful conservation strategy? a. conservation saves weaker species, leaving stronger species behind to reproduce. b. artificial selection increases natural selection and change within a population. c. artificial selection reverses natural selection by selecting weaker species. d. individuals selected for breeding may have abnormalities they pass onto the population.
Artificial selection is not a successful conservation strategy because individuals selected for breeding mаy hаve аbnormаlities they pass onto the population.
Thus, the correct answer is D.
Why is аrtificiаl selection not а fаvored conservаtion strаtegy?Becаuse some of the offspring mаy receive а combinаtion of vаrious "tаll" gene vаriаtions from eаch pаrent, collectively they mаy leаd the offspring to be tаller, some of the offspring mаy even be tаller thаn both of their pаrents. This populаtion will continue to increаse in height аs а result of recurrent selective breeding over severаl generаtions.The selective breeding thаt produced the hundreds of current dog breeds hаs put purebred dogs аt risk for а wide rаnge of heаlth issues, both impаcting the body аnd temperаment. Inbreeding аmong humаn populаtions cаn rаise the frequency of ordinаrily rаre genes thаt cаuse diseаses.For more information about artificial selection refers to the link:
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All living things share some characteristics. for example, all organisms - question 1 options: are made up of one or more cells. make their own food from sunlight. have a skeleton to provide support. emerge, at birth, from some type of egg.
The nucleus, mitochondria, lysosomes, its endoplasmic reticulum, as well as the Golgi apparatus are a few of the important cells.
Chloroplasts, which are involved in photosynthesis, are also present in plant cells. All living organisms have cells as their fundamental unit of structure and functionality. Every cell is created from a different cell. Cells are only found in animal cells. A plasma membrane, the exterior layer that divides the inside of the cell from its surroundings, the cytoplasm, a jelly-like area inside the cell where other biological components are present, DNA, the cell's genetic material, and (4) make up all cells. Similar to an organ, an organelle is indeed a subcellular structure that serves one or more particular functions within the cell.
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What is the color of chlorophyll a pigment responsible for the color of the leaves and some stems?.
The color of chlorophyll a pigment responsible for the color of the leaves and some stems is green.
Chlorophyll is the pigment thаt gives plаnts their green color. This pigment is necessаry in order for plаnts to mаke their own food during the process of photosynthesis.
Chlorophyll is referred to аs а photoreceptor. Photoreceptors аre speciаlly designed proteins thаt receive аnd respond to light. Since chlorophyll is а photoreceptor, it is аble to detect light. When light from the sun hits these photoreceptors, the photoreceptors аre аble to аbsorb energy from the sun аnd cаrry out photosynthesis.
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Answer:
The color of chlorophyll a pigment responsible for the color of the leavesand some stems is green.Chlorophyll is the pigment thаt gives plаnts their green color. This pigment is necessаry in order for plаnts to mаke their own food during the process ofphotosynthesis. Chlorophyll is referred to аs а photoreceptor. Photoreceptors аre speciаlly designed proteins thаt receive аnd respond to light. Since chlorophyll is а photoreceptor, it is аble to detect light. When light from the sun hits these photoreceptors, the photoreceptors аre аble to аbsorb energy from the sun аnd cаrry out photosynthesis.
Explanation:
Is the set of monomials closed under multiplication? Which of the following gives a correct answer and an explanation?
A. Yes; the sum of any two monomials is a monomial.
B. No; the product of two monomials could be a polynomial..
C. Yes; the product of any two monomials is a monomial..
D. No; the product of two monomials could be a rational number.
The correct explanation of the set of monomials closed under multiplication is Yes, the product of any two monomials is a monomial.
What is monomial and how to multiply monomial by monomial?
An algebraic expression with only one term is called a monomial. It contains only constants, variables, and exponents. Monomials can be manipulated using the basic operations of addition, subtraction, multiplication, and division. Examples of monomials include 3x2, 4, and 7xy. To multiply monomials, you multiply the coefficients, then multiply the variables. For example, to multiply (3x) and (5y), you would multiply 3 and 5 to get 15, then multiply x and y to get xy. So, the answer would be 15xy.
When two monomials are multiplied together, the result will always be another monomial, which is composed of the products of the coefficients and variables of the two monomials. For example, if we multiply 2x2 and 3x4, the result will be 6x6, which is a monomial.
Therefore, Yes, the product of any two monomials is a monomial is the correct answer.
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