Final answer:
The evidence from the given model that supports the claim that cell division increases genetic variation in the daughter cells is the fact that each division doubles the number of cells.
Explanation:
The evidence from the given model that supports the claim that cell division increases genetic variation in the daughter cells is the fact that each division doubles the number of cells. As the cell divides, the genetic information is replicated and distributed to each of the daughter cells. This process leads to an increase in the number of cells with different combinations of genes, resulting in genetic variation.
This is the foundation for DNA replication the rule that states that purine adenine always pairs with the pyrimidine thymine and the pyrimidine cytosine always pairs with the purine guanine
Answer:
Chargaff's Rule (Base Pair Rule)
Explanation:
Chargaff's Rules:
Erwin Chargaff, a Columbia university biochemist analyzed the proportions of the purine (adenine and guanine) and pyrimidine (cytosine and thymine) bases in DNA.Chargaff discovered that in DNA, the purines and pyrimidines are in a 1:1 ratio i.e the percentage of purines equal to that of pyrimidines. He further concluded that the amount of adenine was approximately equal to the amount of thymine and that of cytosine was approximately equal to that of guanine.Therefore, adenine always pairs with thymine whereas cytosine always pairs with guanine.a) 1. If you were cross-breeding two plants whose only difference was their scent, you would be performing a ____ cross.
Explanation:
a) 1. If you were cross-breeding two plants whose only difference was their scent, you would be performing a monohybrid cross.
The plants are physically identical, apart from alleles of one gene;thusthe cross is a monohybrid.
DNA sets contain genes that may have different forms called alleles. DNA, which is the genotype, is transcribed into mRNA and later translated into amino acids which are connected together by rRNA to form proteins which constitute the phenotype of an organism. DNA sequence mutations form new alleles, impacting the resulting mRNA, and thus the encoding protein. Within species, there may be adaptation, along with genetic drift, competitive breeding, and natural selection.
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Answer:
Monohybrid cross
Explanation:
Background:
Genes are defined as the units of heredity. Genes contain two or more alternative forms known as alleles. In terms of location, these alleles occupy a locus (place where the gene lies on chromosome) on each of the two homologous chromosomes.
Monohybrid Cross:
In heredity, a monohybrid cross is a cross between two individuals or generations that are homozygous for one gene or trait.A homozygous individual contains the same allele on both of the homologous chromosomes. This means that the individual inherited the same allele from both of the parents.This type of cross produces a heterozygous individual i.e. a hybrid in terms of only one gene or trait.For example, imagine there are two plants that are homozygous in one trait only such as flower colour. Lets assume one of them to be red AA and the other white aa.When these two are crossed i.e. AA X aa, they will produce a heterozygous genotype i.e. Aa. According to Mendel's Law of Dominance, this heterozygous individual will be red as the red trait (A) is dominant.Therefore, in terms of genetics, these plants have been compared on the basis of one trait only i.e. flower colour.what are nociceptors ? what is different about the 2 types of them ?
10. what is the probability of a yellow (Y) and wrinkled pea (r) will appear from a cross of Yyrr x YyRr?
A. 1/8
B. 2/8
C. 3/8
D. 4/8
PLEASE HELP, WILL GIVE BRAINLIEST
Answer:
D
Explanation:
The punnett square showing the cross Yyrr x YyRr is attached
The gametes that the Yyrr individual can produce are either Yr or yr. The yyRr individual can produce YR, Yr, yR, or yr. The possible genotypes are shown in the punnett square.
For a pea to be yellow and wrinkled, it would have the genotype YYrr, or Yyrr (as yellow is dominant (Y) and wrinkled is recessive (r)). Therefore, we count the number of those genotypes of the total genotypes we get.
There are 4/8 that are either Yyrr or YYrr, so the answer is d.
Answer:
It shold be three out of 8 or C. 3/8
Explanation:
So first try to fill out the punnet square (I know you wont because your lazy) anyway after you have filled out the square count the number of Yr-s in your box because we are looking for Y (yellow) and r (red)
I found six out of sixteen or 6/16 which (if you know basic division) simplifies to 3/8 and that is your answer
Your welcome cheeters
Corn rust is a pathogen caused by fungus that can attack corn plants and cause wide spread damage to this staple crop. Much of the midwest farmlands are used to grow corn. What method will best mitigate the impact of corn rust on this important crop?
A)Corn should only be grown in rainy season so its not needed to integrate land
B)Corn should be grown in cold season
C) Cloning
D) Genetic variation so at least some plants would be resistent to corn rust
Answer:
D
Explanation:
Answer:
D. Genetically distinct varieties of corn should be grown so that genetic variation will ensure at least some of the corn plants will be resistant to the corn rust.
Explanation:
Genetic diversity can be rare for selectively bred vegetable varieties, but it is the best method to use to ensure resistance to drought, pests, disease, and cold winters. Without genetic variation, one adverse condition could wipe out whole crop yields for a season.
Will give 20 points if you can help and answer correctly!
Punnet Squares questions!
Answer:
the fathers pheno types would be non-roller and the mothers would be a carrier. the geno types would be for the father rr and the mother would be Rr
Explanation:
the probability of having a child that is a tongue roller is 50 percent and a non tongue roller is 50 percent :)
Answer: The father's phenotype is non- roller and his genotype is rr. The mother's phenotype is tongue-roller and her genotype is Rr because she is a heterozygous tongue-roller.
The probability of having a child who is a tongue-roller is 1/2 and the probability of having a non-roller child is 1/2.
Explanation: The possible genotypes of their children are Rr and rr. Fifty percent of the children are tongue-rollers while fifty percent are non-rollers. Children with Rr genotype will manifest outwardly as tongue-rollers because being a tongue-roller R is dominant over being a non-roller r. R is dominant over r.
See the attached punnet square for better understanding.
Discuss the environmental benefits of carbon sequestration.
Answer:
Planting trees and managing their development is a proven way to reduce the number of harmful particulates in the air5. Carbon sequestered, or stored, is carbon not emitted into the atmosphere. Less carbon in the atmosphere will reduce the greenhouse gas effect and lessen the impacts of climate change.
Explanation:
Hypothesis:
When the concentration outside the system is greater than the concentration inside the system,
Where will solute move?
and will water move?
- An accident victim (who was not wearing a seat belt) was thrown from a vehi-
cle and pronounced dead at the scene. The autopsy reveals the cause of death
to be spinal cord injury resulting in paralysis of the phrenic and intercostal
nerves. Why is this injury fatal?
This injury is fatal because, The phrenic nerve regulates breathing and operates the diaphragm.
Explanation:
The motor ability is provided by the Nerve called Phrenic nerve to the diaphragm. This is a muscle that is very important for the respiration to take place in human. When a damage or injury occurs to the Phrenic nerve, it may result in the paralysis of diaphragm.
When this is damages there may be difficulties in breathing and only small amount of air can be inhaled. Thus the paralysis of this nerve results in the prevention of the victim to find difficulties in respiration. Thus, the example given is fatal because, the phrenic nerve regulates breathing and operates the diaphragm.
Energy in most ecosystems must flow through autotrophs because ______.
Answer: Only autotrophs have the ability to convert energy from the sun (solar energy) into chemical energy.
Explanation: Autotrophs are living organisms which manufacture their own food. Plants are autotrophs because they manufacture their own food in a process called photosynthesis. Photosynthesis is a process by which Chlorophyll containing green plants and some bacteria use solar energy to make organic food substances from carbon dioxide and water. The food produced is consumed by animals to generate chemical energy. Animals depends on plants for their own food and thus are called heterotrophs.
an ionic bond forms when
Answer: When Ionic bonds involve a cation and an anion. The bond is formed when an atom, typically a metal, loses an electron or electrons, and becomes a positive ion, or cation. Then ions produced are oppositely charged and are attracted to one another due to electrostatic forces.
Explanation:
Answer: An ionic bond forms when there is a complete transfer of valence electrons from one metal atom to a non metal atom.
Explanation: The purpose of the transfer of the valence electrons from a metal atom to a non metal atom is so that the two atoms can attain a noble gas octet or duplet structure. Since there is a loss of electron by the metal atom and gain of electron by the non metal atom, the compound formed is usually ionic. Ionic bond is also called electrovalent bond.
Darwin was curious about the patterns in the distribution of living things which is the study of
Answer:
Biogeography
Explanation:
the study of the geographic distribution of living things and the abiotic factors that affect their distribution.
Darwin was curious about the patterns in the distribution of living things which is the study of biogeography.
What is biogeography?The study of geographic distribution patterns of organisms and the variables that influence such distributions is known as biogeography. This field is crucial to our comprehension of the evolution and adaption of marine mammals.
It also offers proof of evolution. One species may evolve into numerous other species to fill available niches on island chains like the Galápagos. The term for this is adaptive radiation.
Historical biogeography, ecological biogeography, and conservation biogeography are the three primary subfields of biogeography. Hence, Darwin was curious about the patterns in the distribution of living things which is the study of biogeography.
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How has the study of mitosis affected scientists' knowledge of cancer?
It led to a study of how to induce cancer cells to divide more rapidly.
It led to an understanding of how cancer cells divide so rapidly.
It led to the development of contact-inhibition regulators.
It led to the discovery of how to prevent cancer cells from dividing.
Answer:
The question is asking how has the study of mitosis affected scientists’ knowledge of cancer. Mitosis is a type of cell division ( so we reject answer c, since it doesn't have to do with cell division) and what we want is to have the cells divide slower (so we reject answer a), but unfortunately, we don't know how to do it yet (so we reject answer d) - the correct answer is: It led to an understanding of how cancer cells divide so rapidly.
Answer:
The correct answer is B). It led to an understanding of how cancer cells divide so rapidly.
Explanation:
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Which answer choice correctly describes why metals are good conductors of thermal energy?
Their atoms have free-floating electrons that easily pass kinetic energy throughout the metal.
Explanation:
The metallic structure of metals allows for delocalized electrons. This means these free electrons can no longer be associated with only one atom in the metallic element but rather the electrons can move freely within the lattice. These electrons can carry with them energy and transmit it within the metal. This is why metals are good conductors of heat and electricity. The more delocalized electrons the metal has (such as Aluminium) the better it is at conducting heat and electricity.
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Answer:
Their atoms have free-floating electrons that easily pass kinetic energy throughout the metal.
Explanation:
just did the quiz
according to mendal’s law of dominance,which statement best describes the result of a cross between parents with genotypes Rr and Rr?
Answer:
according to mendal’s law of dominance,which statement best describes the result of a cross between parents with genotypes Rr and Rr?
All offspring with at least R will have red flower
Explanation:
Rr X Rr = RR, Rr, Rr, and rr
75% will reflect red flower while rr will reflect white flower
Answer:
The answer is C: All offspring with at least one R will have red flowers.
Explanation:
Mendel's Law of Dominance states that: “In a cross of parents that are pure for contrasting traits, only one form of the trait will appear in the next generation. Offspring that are hybrid for a trait will have only the dominant trait in the phenotype.”
This simply means that if there exists two contrasting traits (I.e Rr), one of the traits will always suppress the other, thereby expressing itself. R suppresses r, thus making the offspring with big R have red flowers. The trait is called a dominating trait and the suppressed is called recessive trait.
Which practice could help an agrarian society prevent crops from spoiling
before they can be brought to market?
O
A. Developing irrigation techniques that conserve water
O
B. Cutting down forests to produce more cropland
O
C. Switching from gasoline-powered to electric vehicles
O
D. Creating more efficient methods of food preservation
The phylogenetic chart describes how modern-day elephants (Asian elephants and African elephants) evolved from extinct species. Based on the chart, are Asian elephants more closely related to Mammuthus (mammoths) or Mammuts (mastodons)? Are Mammut mastodons the same species as Paleomastodons? Explain your reasoning for both questions.
Answer:
Aisan elphants are more close to mammoths becasue they share more things on the phylogenic chart. This indicates a closer evolutionary ancestory. Mammut mastodons and paleomastodons are not the same species becasue the mammuts have some ancestory that the palemastodons dont have
Explanation:
Answer: Sample answer:
Asian elephants are more closely related to mammoths because they share more nodes and branches on the phylogenetic chart. This relationship suggests a closer evolutionary ancestry. Mastodons and Paleomastodons are not the same species. There are branches from Paleomastodon and Mammuts that suggest speciation occurred. Mammuts also have common evolutionary ancestors that Paleomastodons do not have.
Explanation:
Essay
(Extended Constructed Response)
69. Compare and contrast the process of cellular
respiration in anaerobic and aerobic organisms.
Discuss the role of oxygen, where the reactions
occur, and the net gain of ATP molecules. help please
Answer and Explanation:
Cellular respiration is the process through which organic compounds are broken down enzymatically to release energy in the cell. Aerobic respiration takes place in cytoplasmic organelles called mitochondria. Glucose is completely broken down through oxidation to carbon dioxide and water with the release of a large amount of energy(38 ATPs). It takes place in presence of oxygen. anaerobic respiration is carried out by a number of microorganisms as well as muscle cells. Glucose is partially broken down in absence of oxygen into either lactic acid and energy(2 ATP) in animals or ethanol, carbon dioxide and energy( 2 ATP) in plants.
How important is DNA to the cell?
Answer:
A
Explanation:
very important for cellular life and function
A bunch of ducks fighting over food is an example of?
Answer:
Competition
Explanation:
Describe how the lac operon functions and explain how it permits E. coli to produce the enzymes needed to break down lactose when it is present in the bacterium.
Answer and Explanation:
Bacteria like E.coli have devised mechanisms of survival even when conditions are harsh. This is through the production of such enzymes as B-galactosidase that enable them break down substrates like lactose in their metabolism.
For E.coli, mechanism that controls how enzyme activity is turned on or off target the genes that code for the enzymes. This system is termed as lac operon, and the enzymes that are coded for by genes which are sometimes active or inactive and depending on substrate availability are referred to as inducible enzymes.
So how does the lac operon work?
Lac operon works to regulate lactose metabolism in E.coli. An operon refers to a collection of one or more structural genes that direct synthesis of a particular enzyme.
So when lactose is present in a growth media, it acts as an Inducer hence it binds to lac oppressor (normally blocks operator). This reppressor then cannot block the operator, and RNA polymerase enzyme can proceed and bind the promoter hence transcription of the Z, Y and A genes that form the mRNA.
The mRNA in association with ribosomes initiate the synthesis of the following enzymes for lactose metabolism;
Permease, Y gene - that normally directs the entry of lactose into the cells
B-galactosidase, Z gene - that aim to break down lactose to simple units
Transacetylase, A gene - for complete lactose breakdown.
So after these events in E.coli cell, the lactose that was once available has been broken down and none is left to bind to repressor. What happens thereafter is the binding of this active repressor to the operator and thus system is shut down or more correctly, turned off.
Definition: This is an organism that relies on other organisms for its food and energy supply; also called a heterotroph.
Answer:
And autotrophic are those that make their own food from simple substances.
Explanation:
Answer:
Guys I think it is Composer
Explanation:
lets say there is a tomato plant, caterpillar depends on the plant to survive
compare the structure of the left atrioventricular valve with that of the aortic valve
The left atrioventricular valve, or mitral valve, has two cusps and is located between the left atrium and ventricle. The aortic valve has three cusps and is located between the left ventricle and aorta.
Explanation:The left atrioventricular valve, also known as the mitral valve, and the aortic valve are both important valves in the heart. However, they differ in their structure and location within the heart.
The left atrioventricular valve is located between the left atrium and the left ventricle. It consists of two cusps or leaflets, known as the anterior and posterior cusps. These cusps are attached to chordae tendineae, which in turn are attached to papillary muscles, helping to prevent backflow of blood into the left atrium during ventricular contraction.
In contrast, the aortic valve is located between the left ventricle and the aorta. It has three cusps, known as the left, right, and posterior cusps. These cusps are thinner and more rigid compared to the cusps of the left atrioventricular valve. Their main function is to prevent backflow of blood from the aorta into the left ventricle during diastole.
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The left atrioventricular valve, or mitral valve, has two cusps and is connected to papillary muscles via chordae tendineae. The aortic valve has three cusps and operates without chordae tendineae, controlling blood flow from the left ventricle to the aorta with pressure changes.
The structure of the left atrioventricular valve, also known as the mitral valve or bicuspid valve, differs significantly from the structure of the aortic valve. The mitral valve resides between the left atrium and left ventricle, and it has two cusps: the anterior medial cusp and the posterior medial cusp. These cusps are anchored to the heart muscle by chordae tendineae, which connect to two papillary muscles that protrude from the ventricular wall. This valve is critical for maintaining unidirectional blood flow from the left atrium to the left ventricle.
In contrast, the aortic valve is located at the junction of the left ventricle and the aorta, guiding blood into the systemic circulation. It is a semilunar valve with three cusps that function without the need for chordae tendineae or papillary muscles. Its leaflets open and close with the pressure changes in the left ventricle during the cardiac cycle, ensuring blood only flows in one direction from the heart into the aorta.
While both valves are essential for the cardiac function of circulating blood through the heart and into the body, their structural differences are tailored to their specific positions in the heart and the pressure environments they encounter within the cardiac cycle.
Can anyone help me with this science any help is appreciated.
Why are government laws and agencies needed to monitor our impact on the
environment?
Government laws and agencies are needed to monitor our impact on the environment because they ensure compliance, provide scientific knowledge, and promote sustainability.
Explanation:Government laws and agencies are needed to monitor our impact on the environment for several reasons.
Firstly, without laws and regulations, individuals and businesses may prioritize their own interests over environmental protection, leading to negative consequences such as pollution and ecosystem destruction. By having government agencies monitor and enforce environmental laws, they can ensure that everyone is following the rules and taking responsibility for their actions.Secondly, government agencies play a crucial role in collecting data and conducting research to understand the impact of human activities on the environment. They can monitor air and water quality, track changes in biodiversity, and assess the overall health of ecosystems. This information is essential for making informed decisions and developing effective policies to mitigate environmental damage.Lastly, government laws and agencies help promote sustainability and encourage individuals and businesses to adopt environmentally friendly practices. By setting standards and providing incentives or penalties, governments can steer behavior towards more sustainable practices, such as reducing greenhouse gas emissions, conserving resources, and promoting the use of renewable energy.In summary, government laws and agencies are needed to monitor our impact on the environment because they ensure compliance, provide scientific knowledge, and promote sustainability.
Which of the following represents a recessive trait?
Select one:
a. R
b. s
c. Q4
d. T
Answer:
b. s
Explanation:
you can determine alleles by recessive (lowercase) and dominant (upercase)
Which discovery is most directly related to careers in biology?
A. the formation of a new space program to launch flights to Mars
B. the discovery of the genes that are responsible for Alzheimer’s disease
C. the unearthing of an ancient civilized community in the Pacific Northwest
D. the creation of a new synthetic material that is used in electronics manufacturing
Explanation:
Biology is the study of Life and living organisms. Any person associated with research or scientific studies of living organism is directly related to careers in biology.
Alzheimer's disease is a genetic defect caused in living beings. The genes causing this disease are:
Amyloid precursor protein (APP) Presenilin 1 (PSEN1) Presenilin 2 (PSEN2)Due to mutation of these genes the nerve cells get damaged and patients begin to show the symptoms usually at the age of 60 and above. The genetic test results can help in early prevention and cure to Alzheimer's disease. Though research is being continued to find if there are more genes involved.
Answer quick please!
What is the teaching of concepts and skills through
verbal explanation or instruction?
Select one:
O a. Classical condititioning
O b. Tutelage
O c. Vicarious conditioning
O d. Modeling
Answer:Answer: B
Explanation:
Tutelage is a fundamentally collaborative process, enabling a leaner to acquire new concepts and skills from examples. The learner contribute to the process by expressing their internal state through communicative or interactive acts e.g., expressing understanding, confusion and attention e.t.c
Answer:
Tutelage
Explanation:
What siz a chloroplast
Answer:Chloroplasts are roughly 1–2 μm (1 μm = 0.001 mm) thick and 5–7 μm in diameter.
Explanation: