Cystic fibrosis is a recessive genetic disease caused by a mutation in the gene that encodes the CFTR protein, which transports chloride ions in and out of cells. Some populations have a relatively high rate of cystic fibrosis carriers, possibly because the mutation protects against severe dehydration in diseases like cholera or typhoid. What concept does this best illustrate?
A: Polygenic traits
B: Genetic drift
C: Pleiotrophy
D: Heterozygote advantage
its letter b the genetic drift because it is mechanism of evolution in which allele frequencies of a population change over generation due to chance.
Cystic fibrosis is a recessive genetic disease that encodes the CFTR protein, but some populations have a relatively high rate of cystic fibrosis carriers, which protects against severe dehydration and is an example of the heterozygote advantage that is present in Option D.
What is the heterozygote advantage?When the gene is present in a heterozygote state, the gene product benefits the individual rather than harming him or her, as in sickle cell anemia and cystic fibrosis. In sickle cell anemia, the heterozygote state protects the person from malaria, and in cystic fibrosis, it protects the person from dehydration.
Hence, Cystic fibrosis is a recessive genetic disease that encodes the CFTR protein, but some populations have a relatively high rate of cystic fibrosis carriers, which protects against severe dehydration and is an example of the heterozygote advantage that is present in Option D..
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Select the neurological problems that affect women more often than men.
Answer: Imma say the Parkinson's disease.
This disabling neurological disease affects about 50% more men than women.More than two times more men than women are affected by antisocial personality disorder and substance use disorder. Several cancers, including stomach cancer (2:1), oesophageal cancer (3:1), liver cancer (2:1 to 4:1) and oral cancer (2:1 to 3:1), which have mostly lifestyle-based risk factors, are more common in men.
Hope this helps have a awesome day/night❤️✨Explanation:
Which of the following best explains why the biosphere is a key component of the Earth’s systems?
a.
The biosphere is a key component of the Earth’s systems because it is a common concept to many disciplines in science.
b.
The biosphere is a key component of the Earth’s systems because the seasonal cycles directly affect primary productivity.
c.
The biosphere is a key component of the Earth’s systems because it helps drive the other systems by interacting with and exchanging matter and energy with the other spheres.
d.
The biosphere is a key component of the Earth’s systems because it has evolved to create the chemical composition of the planet we know today.
Please select the best answer from the choices provided
A
B
C
D
Answer:
c. The biosphere is a key component of the Earth’s systems because it helps drive the other systems by interacting with and exchanging matter and energy with the other spheres.
Explanation:
A scientist runs an SDS-PAGE experiment two separate times on a protein with a molecular weight of 200 kD. For the first experiment he treats the protein with SDS only and for the second experiment he treats the protein with both SDS and a reducing agent. If the first gel yields one band showing a molecular weight of 200 kD and the second run yields one band showing a molecular weight of 25 kD, the researcher should conclude that
Answer:
This protein consists of 8 subunits of equal size linked by disulfide bonds
Explanation:
The sodium dodecyl sulfate-polyacrylamide gel (SDS-PAGE) is a technique widely used in molecular biology laboratories to separate proteins with molecular weights between 5 and 250 kDa. SDS is an anionic detergent used to denature proteins before electrophoresis. SDS can denature proteins by altering non-covalent bonds such as hydrogen, hydrophobic and ionic interactions, but they cannot cleave disulfide bonds. In this case, reducing agents (e.g., β-mercaptoethanol or dithiothreitol) have been used to cleave disulfide bonds.
When the mutated DNA sequence is transcripted/translated, what was the outcome?
ig _ander80239 in need of bio honors test help
PLS HELP
Answer:
Explanation:
Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). ... The newly formed mRNA copies of the gene then serve as blueprints for protein synthesis during the process of translation.
Why don't you have mechanical energy
when
you are
laying on the ground?
Answer:
If an object is lying on the ground, and is nowhere near a "hole" or a cliff, then for the purposes of this system, the object would have a height of zero, therefore would have no gravitational potential energy. And therefore, no work could be performed on the object by gravity.
Explanation:
What conclusion can you draw from the results shown?
A)The amount of the drug was decreased to achieve the same effect.
B) The mouse is in a state of tolerance.
C) The mouse is suffering from withdrawal symptoms.
D) The amount of drug injected was the same throughout the 7 weeks.
Answer and I will give you brainiliest
Answer:
B) The mouse is in a state of tolerance.
Which of the following
are
Phylogenetic trees also know as ?
O Cladogram
O Clade
O Node
O Linnaean
The phylogenetic trees are also known as CLADOGRAMS.
A phylogenetic tree is a diagram that shows evolutionary relationships between different species/taxa from a common ancestor to its descendants.A cladogram is a graphic representation that exhibits hypothetical phylogenetic relationships between groups of organisms/species/taxa.In a cladogram, groups of organisms/species/taxa are organized into clades, which share different traits.In a cladogram, a node denotes the common ancestor of a given clade.The Linnaean system of classification consists of grouping organisms/species according to their physical similarities, thereby it is not an evolutionary system of classification.
In conclusion, phylogenetic trees are also known as CLADOGRAMS.
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Answer:
Cladogram is correct on egde2023
Explanation:
Transcription is the process of making
What is full form of ELISA?? Where it is used for ?¿
how many chromosomes are there in human ovum
Answer:
23 chromosomes
Unlike all the other cells in a human body which are diploid, human sex cells are haploid. That means that both sperm cells and ova are haploid; containing only 23 chromosomes.
Explanation:
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(─‿─)
The chromosomes in egg and sperm cells have just 23 chromosomes each.
What is gamete?Male gametes are termed sperm, while female gametes are called "ova." Gametes are an organism's reproductive cells, also referred to as "gender cells." Since gametes are haploid cells, each chromosome is present in one copy per cell.
Unfertilized reproductive cells are called gametes. A zygote is an egg that has been fertilized. Gametes are always haploid cells since they are a byproduct of meiosis.
Zygote is a diploid structure because it results from the fusing of a male and female haploid gamete.
Similar to a sperm, an egg has 23 chromosomes total, which is half the number found in a normal cell.
The resultant embryo will therefore have the typical 46 chromosomes in total after an egg and sperm join during fertilization.
Thus, there are 23 chromosomes in human ovum.
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What type of material is often used to make Impressions of tool marks?
A. cement mix
B. dental paste
C. porcelain clay
D. plaster of Paris
Explanation:
I would say/ a rubber base material is used for tool Mark's, I believe dental paste is used because it has the same material as described above....
Which statement is true about a red brick?
A red brick reflects red light and absorbs blue and green light.
O A red brick reflects blue light and absorbs red and green light.
A red brick reflects green light and absorbs blue and red light.
O A red brick reflects blue and green light and absorbs red light.
Answer:
1. red brick reflects red light and absorbs blue and green light.
The statement which is true about a red brick is: A. A red brick reflects red light and absorbs blue and green light.
An electromagnetic spectrum refers to a range of frequency and wavelength that an electromagnetic wave is distributed (extends).
Generally, an electromagnetic spectrum comprises the following radiations:
Gamma rays.Ultraviolet radiation. X-rays. Radio waves. Infrared radiation.Visible light.A visible light can be defined as the range of electromagnetic radiation or wavelength that the human eye can detect or see.
Also, the colors of the visible light spectrum are:
Red.Orange.Blue.Indigo.Green.For a red brick, all red light would be reflected while the other colors such as blue and green light are absorbed.
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Is hydrogen an atom or molecule
which organelle breaks down sugar molecules that supply energy to the cell
Answer:
Mitochondria
Explanation:
4. What is a chromosome?
Which of these genotypes represents a carrier?
Аа
aa
XXY
AA
Answer:
Aa
Explanation:
from what I can remember from 7th grade science
Which of the following is carried out by vesicles?
O Synthesizing proteins
O Facilitated diffusion
Breaking down substances within the cell
Organizing organelles prior to division
Answer:
breaking down substances within the cell
Explanation:
there are many different types of vesicles, Peroxisomes and lysosomes are both types that break down substances in the cell
The correct statement about vesicles is "Breaking down substances within the cell"
Vesicles are an organelle isolated from the cytoplasm by a membrane-like lipid layer.
Its function is to store, move and process products and cellular waste.Endocytosis and exocytosis transports are characterized by the fact that the substances move through vesicles.The vesicles incorporate substances (endocytosis) and through degradation, they expel large particles that cannot cross the plasma membrane, this mechanism is exocytosis.Therefore, we can conclude that the cell incorporates, inside the vesicle, particles from the extracellular environment and also through the vesicles it releases degradation products to the extracellular environment.
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The primary colors of visible light are:
Answer: red, green and blue
Answer:
Correct / true
Explanation:
why is the structure of dna important to its function
Answer:
The function of DNA is tied to its structure. ... The sugars and phosphates link the nucleotides together to form each strand of DNA. When two strands of DNA come together, base pairs form between the nucleotides of each strand. Nitrogenous bases pair together in the following way: A-T and C-G.
describe how you would test a sample of powdered milk to see if it contained protein
Answer:
How would you contained protein
Explanation:
One would test a sample of powdered milk to see if it contained protein by using copper sulfate solution and sodium hydroxide solution.
What is protein?A structure composed of amino acids. The body need proteins to function properly. They serve as the building blocks for several bodily components, including the skin, hair, and enzymes, cytokines, and antibodies.
An essential component of a balanced diet is protein. Amino acids are the chemical "building blocks" that make up proteins.
Amino acids are used by your body to create hormones, enzymes, and to build and repair muscles and bones. They can be utilized as a source of energy as well.
The test can be done as:
To your meal solution, add a few drops of copper sulfate solution. A few drops of sodium hydroxide solution should be added. Protein is present in the food if the solution becomes purple.Thus, using copper sulfate solution and sodium hydroxide test, one can determine the protein content in the sample.
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Oompah’s with type O blood receive a tax break. ophine oompah has type a blood, but he wants a wife that will give him children with type o. what blood type should he request on his dating survey? what must Opine’s blood type be in order to produce offspring with type O blood?
Answer:
He should request type O on his dating survey.
Opine's blood type must be AO to have a higher probability of producing O offsprings.
Explanation:
O blood type is recessive so, when it is paired with another blood type like B or A, these would be dominant, giving B and A blood, respectively.
O blood type results are possible thanks to OO genotypes.
If the man's blood type is A, to have a higher chance of producing OO offsprings, his blood should be AO. The other possibility is that he has AA blood, which will result in a low probability of OO offsprings.
As regards the mother, her blood type should be OO.
We can see this more clearly in Punnet Square.
║ A ║O
O║AO║OO
O║AO║OO
There is a 50% of probability of having O offsprings with AO and OO.
║ A ║A
O║AO║AO
O║AO║AO
With AA and OO, the probability is 0%
║ A ║O
A║AA║AO
O║AO║OO
With both parents having AO, blood the probability of having a OO offspring is 25%.
In conclusion, the higher chances of producing a OO offspring is if the parents are AO and OO.
What sort of receptor do skeletal muscle cells use to receive signals from somatic lower motor neurons?
a. Nicotinic
b.Muscarinic
c.Adrenergic
d.Mechanoreceptive calcium channels
Answer:
C
Explanation:
Skeletal muscle cells use Adrenergic receptor to receive signals from somatic lower motor neurons ; ( C ) Adrenergic
Skeletal muscles are organs of the muscular system found in vertebrates. they are attached to the skeletal bones through tendons. they all posses the longest of all muscles cells as well.
Skeletal muscles receive signals from somatic lower motor neurons through the Adrenergic receptor found in all cell and tissues .
Hence we can conclude that skeletal muscle cells use Adrenergic receptor to receive signals from somatic lower motor neurons.
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The amount of energy at each trophic level in an ecosystem decreases as it moves through the ecosystem. Typically, only about 10 percent of the energy at one trophic level is transferred to the next level. The remaining energy is lost through metabolic processes as heat.
Suppose that, in the ecosystem modeled above, 150,000 kcal (kilocalories) of energy are contained within green plants. Assuming that the amount of energy transferred from one trophic level to the next is exactly 10 percent, determine the following amounts of energy in the ecosystem.
Answer:
Explanation:
Energy transferred to next trophic level=10%×150,000kcal
=10/100×150,000
=15,000kcal
The amount of the energy in the ecosystem should be considered as the 15,000kcal.
Calculation of the amount of energy:Since there is 150,000 kcal (kilocalories) of energy are contained within green plants.
And, 10 percent of the energy at one trophic level is transferred to the next level.
So here the amount of energy be like
= 10% of 150,000
= 15,000 kcal
Hence, The amount of the energy in the ecosystem should be considered as the 15,000kcal.
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If air pollution increases enough to begin reducing the amount of solar radiation to
reach the surface of the earth,
A. the ocean's thermocline would be directly affected
B. the salinity of the surface of the ocean would not be affected
C. the ocean would no longer be layered
D. more oxygen could be stored in the ocean
Answer:
options c.....
...........
The mutations responsible for the dark fur color in the Arizona mice were absent from the three different populations of New Mexico mice. No Mc1r mutationswere associated with dark fur color in the New Mexico populations. These findings suggest that adaptive dark coloration has occurred at least twice in the rock pocket mouse and that these similar phenotypic changeshave different genetic bases. How does this study support the concept that natural selection is not random
Answer:
Following are the solution to the given question:
Explanation:
Please find the complete question in the attached file:
In the given question, the whole study reinforces the fact which natural selection also isn't transformed through producing much more confirmation which genetic polymorphisms occur because once required as well as that they can produce the very same mutation as a function of climate transformation except in specific environments.
You have a circular plasmid containing 9 kb of DNA, and you wish to map its EcoRI and BamHI sites. When you digest the plasmid with EcoRI and run the DNA on a gel, you observe a single band at 9 kb. You get the same result when you digest the DNA with BamHI. When you digest with a mixture of both enzymes, you observe two bands, one 6 kb and the other 3 kb in size. Explain these results. Draw a map of the restriction sites.
Answer:
A nick is created between G and A in GAATTC when using Eco R1 site while a nick is generated between G and G in GGATCC when Bam H1 is used. The difference in the nicks created is the main reason you observe two bands when you digest the circular plasmid with a mixture of both
Explanation:
Circular plasmid containing : 9 kb of DNA
Eco R1 and Bam H1 are known as restriction sites in DNA ( i.e. special sequences found in a DNA ) hence they can be specifically cleaved by the restriction enzymes enabling the insertion of a gene. that is why you will get a same result when you digest the Plasmid with either Eco R1 or Bam H1
but A nick is created between G and A in GAATTC when using Eco R1 site while a nick is generated between G and G in GGATCC when Bam H1 is used. The difference in the nicks created is the main reason you observe two bands when you digest the circular plasmid with a mixture of both
The introduction of Caulerpa, also known as killer algae, into California was ultimately the result of _______.
a.
hull fouling
b.
the aquarium trade in exotic, nonnative aquatic species
c.
intentional release
d.
an algae farming company
Answer: A
Explanation: Hull Fouling
The introduction of Caulerpa, also known as killer algae, into California was ultimately the result of the aquarium trade in exotic, nonnative aquatic species. The correct option is b.
What is exotic species?Exotic species are those that have been introduced, either intentionally or unintentionally, by humans into an ecosystem where they did not evolve. Such introductions are most likely a natural occurrence.
Endemic species are those that are found only in one region and nowhere else on the planet.
Invasive species have the potential to extirpate native plants and animals, reduce biodiversity, compete with native organisms for limited resources, and alter habitats.
This has the potential to have significant economic consequences as well as fundamental disruptions to the coastal and Great Lakes ecosystems.
Caulerpa, also known as killer algae, was introduced into California as a result of the aquarium trade in exotic, nonnative aquatic species.
Thus, the correct option is b.
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What theories of the moon's creation have scientists debunked?
Answer:
Scientists have determined that Earth and the moon most likely could not have formed together when the solar system was created. If they had, the moon would have a large iron core like Earth's, but it instead has a small iron core.
Explanation:
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A) How do scientists use molecular clocks to study evolution?
B) Explain some assumptions and limitations of the molecular clock concept.
Answer:
A) A molecular clock is a measure of evolutionary time based on the theory that specific DNA sequences mutate at constant rates. To use a molecular clock, scientists first select two different species and compare their DNA sequences. They can compare the DNA sequences directly, or by looking at the RNA and protein molecules created from the DNA. Molecular clocks help to measure the number of changes and mutations which accumulate in the gene sequence of different species over a period of time.
B) Molecular clocks assume the neutrality of gene mutation. They are based on the fact that genetic mutations although random, occur at a relatively constant rate. Evolutionary biologists use this information to deduce how species evolve and determine when two species diverged on the evolutionary time line. It is useful in the study of variations in selective forces, and also facilitates establishing the dates of phylogenetic events including those not documented by fossils. Molecular clocks do have some limitations. Rates of change may not be constant, may not be the same in all organisms, and may be different for different genes.
I used the answer above and added some stuff here and there, so credit to them. I'm not sure if what I wrote makes much sense, but hopefully it can be somewhat helpful. :)