Mutations are triggered by
Answer:
Mutations can also be caused by exposure to specific chemicals or radiation.
Explanation:
(mark as brainliest please)
Answer:
mutations can be triggered by errors during DNA replication, but also environmental contributions, such as uv light from the sun.
In snapdragons, flower color is determined by a gene with two alleles. Red flower color (R) shows incomplete dominance over the gene for white flower color (R'). A scientist is observing the genes and genotype of a snapdragon population. Which observation provides evidence that the population is evolving?
A) The alleles R and R' have unequal frequency in the population.
B) The population is decreasing, and the allele frequencies remain the same.
C) The allele R' is becoming more common in the population.
D) The population is increasing, and the allele frequencies remain the same.
Answer:
C) The allele R' is becoming more common in the population.
The observation from this experiment provides the evidence that the population is evolving and the allele R' is becoming more common in the population. Thus, the correct option is C.
What is Incomplete dominance?Incomplete dominance is the form of gene interaction which results from a cross in which each of the parental contribution is genetically unique and the allele gives rise to progeny whose phenotype is intermediate of the two parental genotypes and phenotypes. Incomplete dominance is also referred to as semi-dominance or partial dominance. It is an exception of the Mendel's law of dominance.
From the observation made in the experiment, it can be said that the allele R' which is responsible for white colored flowers in the plant are becoming more common in the population.
Therefore, the correct option is C.
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Independent assortment is the exchange of genetic material between
homologous chromosomes.
True Or False
Answer:
False
Explanation:
According to Gregor Mendel in his law of INDEPENDENT ASSORTMENT, independent assortment of genes is a phenomenon whereby the segregation of the alleles of one gene into gametes occurs independently of the alleles of another gene i.e. their segregation does not affect/influence one another. Independent assortment occurs in the Metaphase 1 of meiosis 1, where homologous chromosomes randomly align at the equator of the cell. This random orientation of homologous chromosomes determines which chromosome will separate into which gamete.
According to the question, the exchange of genetic material between homologous chromosomes is termed CROSSING-OVER. Crossing over or Recombination occurs during the Prophase I state of meiosis I, where non-sister chromatids of homologous chromosomes exchange a portion of their gene.
Hence, the answer is false because the exchange of genetic material between homologous chromosomes is crossing-over.
Some individuals who are infected with malaria develop anemia, which is a deficiency of red blood cells.
a) How could anemia benefit these individuals? b) If they have children will the children be anemic?
Answer:
...
Explanation:
Anemia can be benefitial in some cases, because it can help keep you safe from other harmful diseases like tubercuosis. No, it cannot be passed down.
Which of the following statements about plant reproduction is TRUE?
a. Plants only reproduce sexually.
b. Reproduction in plants usually requires windy environments.
c. Flower shape, color, and odor can attract animals needed for plant reproduction.
d. Reproduction in most plants requires honeybees to carry pollen from one plant to another.
Answer:
D
Explanation:
A is wrong since plants reproduce sexually and asexually.
B is not logical since plants do not need windy environments for reproduction.
C is not logical either since animals and plants do not reproduce.
D is the most logical answer since honey bees play an important role in pollinating plants and carrying pollen from one plant to another since plants can not move and are autotrophs.
Reproduction in most plants requires honeybees to carry pollen from one plant to another is true about plants reproduction.
What do you mean by plant reproduction?Plant reproduction is the production of new offspring in plants, which can be accomplished by sexual or asexual reproduction. Sexual reproduction produces offspring by the fusion of gametes, resulting in offspring genetically different from either parent.
The parent plants have male and female sex cells, called gametes. The genetic material from the male and female gametes combines to produce offspring. We call this process fertilization. The product of sexual reproduction are seeds.
Plant fertilization is the joining of male and female gametes, resulting in a zygote. The most generalized form of this process requires four steps: pollination, germination, penetration of the ovule, and fertilization.
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How do viruses recombine different DNA?
Answer:
The genetic interaction of DNA viruses can result in break-rejoin recombination, in which the two DNA molecules of different viruses break and then cross over. Break-rejoin recombination results in novel progeny viruses with some DNA sequences of both types of parental viruses.
Explanation:
Answer:
the two DNA molecules of different viruses break and then cross over.
Explanation:
Break-rejoin recombination results in novel progeny viruses with some DNA sequences of both types of parental viruses.
Predator and prey relationships are an important part of the ecosystem. Explain how the Orcas and leopard seals are tertiary consumers?
Of all the animals in the animal kingdom which one(s) would have the best chance for survival in mountains?
Answer & explanation:
Mountains are large formations of land at high altitudes, where conditions are often difficult. For example, cold weather and food shortages.
In the highest areas of the mountains, animals such as vultures, eagles, hawks and other birds of prey usually prevail.
In addition, it is common for the sides of the mountains to be covered with forests. In these areas it is possible to observe the predominance of animals such as moose, goats, sheep, skunks, llamas and lynx. This group has good climbing skills and manages to stay in the side of the mountains and in some high areas (not as high as the previous group).
Meanwhile, in the lower parts of the mountains, where the forest is denser, it is possible to observe the predominance of snakes, wolves, marmots, foxes, etc.
Interphase lasts for
of a cell's life
98%
80%
50%
20%
Please help I need help nowww pleaseeeeeee
Answer:
80%
Explanation:
Which claim is supported by significant scientific research?
Which of the following is/are true about eukaryotic transcription?
A) RNA polymerases bind directly to the core promoter (TATA box)
B) Transcription factors are required for RNA polymerase ll-dependent transcription
C) RNA polymerase ll transcribes the protein-coding genes
D) Poly-A tail is the last part of transcript synthesis by RNA polymerase ll.
E) rho factor participates in transcription termination
Answer:
Option B is true (Transcription factors are required for RNA polymerase ll-dependent transcription)Explanation:
Option B is correct because many different transcription factors are involved in the eukaryotic transcription, particularly genes transcribe by RNA polymerase II. TFIID, A, B, F, E, and H are general or basal transcription factors of human.
Option A is wrong because RNA polymerase II first bind with the general transcription factor, TFIID. TFIID recognise the TATA box and forms a platform for TFIIB binding.
Option C is wrong because RNA polymerase II transcribe protein coding genes but it also transcribe small nuclear RNAs (snRNAs).
Option D is incorrect because transcription of poly-A tail is synthesized by template-independent RNA polymerase called poly(A) polymerase.
Option E is also incorrect- rho factor or rho-dependent termination is used by bacterial transcription termination process.
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Question 12
Identify and select the the correct vocabulary that correctly describes DNA. Choose ONLY the correct answers, pick 3.
Answer:
I personally answered:
nucleotides with adenine, guanine, cytosine, or thymine are the monomers
thymine base pairs with adenine
guanine base pairs with cytosine
Explanation:
Which trend in hominid evolution can be supported by fossil evidence?
Walking upright
Use of tools
Increased intelligence
Decorating cave walls
The diet of leaf-cutter ants is principally
a. leaves
b. fungus
c. saliva-coated leaves
d. fungus-treated leaves
Answer:
it would be B.
Explanation:
Answer:
b. fungus
Explanation:
How is Carbon Dioxide abbreviated (shortened)?
Answer:
CO2
Explanation:
You create a punnett square to determine the probability of hair color being passed to
offspring. Brown hair is dominant. Blond hair is recessive. Both parents have brown hair.
Both parents are heterozygous. What is the probability that the offspring will also have
brown hair?
ofteprings Brown hair to de
Answer:
75%, or 3/4's
Explanation:
Parent's genotypes are Bb because they are homozygous & brown hair is dominant. Cross this, and you get the genotypes of the offspring: BB, Bb, Bb, and bb. The proability that offspring will also have brown hair is 3 out of these 4 genotypes, so 75%.
Which cellular process creates energy?
A. The conversion of ADP to ATP
B. The breaking of the chemical bond between the 2nd and 3rd phosphate
molecules in ATP.
C. The breaking of lipid chains.
D. The transportation of ions across the membrane.
Thank you!!
Answer:
B. The breaking of the chemical bond between the 2nd and 3rd phosphate
molecules in ATP.
Answer:
The conversion of ADP to ATP if I remember correctly.
Study the image.
Which best describes what the picture shows?
an organism
a community
a niche
a population
Answer: a community
Explanation:
an organism is one
a community is a small group
a niche is what the animal does
a population is the entire species
PLEASE HELP I WILL BE GIVING THE BRAINLIEST AND 30 POINTS!!!!!!!!
Mila had looked at diagrams of a plant cell and an animal cell. The book she used showed each stage of cell division. She noticed that during cytokinesis, plant and animal cells divided in a different way so she looked up why. How does cytokinesis differ in plant and animal cells?
A. The animal cell only needs to divide once and pinch off during cytokinesis to form the daughter cells. The plant cell must divide twice in order to form the cell plate and two daughter cells.
B. The plant cell only needs to divide once and pinch off during cytokinesis to form the daughter cells. The animal cell must divide twice in order to form the cell plate and two daughter cells.
C. The cell plate forms in an animal cell that divided the daughter cells and makes the cell membrane and cell wall. The plant cell uses the cell membrane to pinch off the cytoplasm into two daughter cells.
D. The cell membrane in animal cells pinches off the cytoplasm into two daughter cells. The plant cell forms a cell plate that divides the daughter cells and forms the cell membrane and cell wall.
Answer:I think the answer is B
Explanation:
B should be correct!
Hope this helps.
Intense competition would most likely occur between?
two species that live in different forests but eat the same foods.
two species that live in different forests and eat different foods.
two species that live in the same forest but eat different foods.
two species that live in the same forest and eat the same foods.
Answer:
Two species that live in the same forest but eat the same foods because, they are competing for the same exact things in the same area. Thus making it difficult if one obtains food and the other does not have anything left to get.
Explanation:
Which would a microscope be LEAST useful in studying?
A. spider
B. amoeba
C. bacterium
D. paramecium
Answer:
A
Explanation:
spiders can be seen with the naked eye
Answer:
A
Explanation:
A spider is large enough to see and observe without a microscope. Bacteria, amoeba and paramecium are all very tiny, and can’t be seen with just our eyes. To see these things, we would need a microscope. Therefore, a microscope would be the least useful when studying A: a spider.
Everyone in Squidward’s family has light blue skin, which is the dominant trait for body color in his hometown of Squid Valley. His family brags that they are a “purebred” line. He recently married a nice girl who has light green skin, which is a recessive trait. Use a Punnett square to determine the possibilities that would result if Squidward and his new bride had children.
List the possible genotypes and phenotypes for their children. *
Can i please have a explenation
All their children will have heterozygous genes because squidward is "purebred", or homozygous dominant. His wife has to be homozygous recessive for a recessive trait to show up. Every time you cross a homozygous dominant trait with a homozygous recessive trait, you will get heterozygous kids. This means all of them will have light blue skin.
Which of the earths sphere is by far the largest?
What are the 2 major categories of angiosperms?
Answer:
Monocotyledons (monocots) and dicotyledons (dicots)
Explanation:
Answer:
Monocotyledons (monocots) and dicotyledons (dicots).
Explanation:
I don't know if this actually needs an explanation :)
1. I represent the number of protons in the nucleus of an element.
Pls tell me the answer its for a word search?!?!?!
Answer:
Atomic Number
Explanation:
The atomic number gives you the number of protons in a given element.
The fastest speed at which we might commu-
nicate with another technological civilization
among the stars (according to our present un-
derstanding of science) is
1. the orbital speed of the Earth.
2. instantly (as fast as we want) if we only
knew where they were located.
3. the speed of light.
4. the speed of the Voyager spacecraft
(which is typical of our space probes).
5. the speed of sound (the natural speed for
messages).
Answer:
The answer is Number 3. The speed of light
Directional selection only occurs in response to naturally occurring events.
Please select the best answer from the choices provided
Тrue
False
Answer:
False
Explanation:
Directional selection is a force in nature that causes a population to evolve towards one end of a trait spectrum. This change happens gradually and is hard to notice over a short period of time. This change is consistent and constant.
While Congress has the power to create new laws, they can be vetoed by the President. In addition, the Executive Branch must enforce these laws. What two
different constitutional principles are demonstrated by these relationships?
Select one:
A
checks and balances and separation of powers
B.
separation of powers and eminent domain
C
federal supremacy and due process
D.
separation of powers and quartering of troops
Answer:
A, Checks and balances and separation of powers.
Explanation:
Answer:
The correct answer is:
checks and balances and separation of powers
Explanation:
The system of checks and balances refers to instances in which the powers of the branches of government overlap, such as the Executive and the Legislative branch both having some power over the acts passed by Congress. Separation of Powers refers to instances in which separate branches have completely separate responsibilities, as in creating, interpreting, and enforcing the laws. Both of these doctrines are in place to ensure no branch gains too much power.
When a plant does not get enough water its leaves wilt and stomata are
closed to prevent further loss of water through transpiration. This wilting of leaves and closing of stomata is caused by a growth inhibiting hormone. What is the name of this growth inhibiting hormone that causes wilting of
leaves?
• auxin
• gibberelins
• abscisic acid
Animal-like protists, such as Amoeba and Paramecium.
Answer:
Yes Amoeba and Paramecium are considered as animal-like protists
Explanation:
Amoeba and paramecium are considered to be animal-like protists because they are able to move through their habitat, and they gain energy from other sources.
