Which of the following is a source of genetic variation in a population?
a Differences due to a car accident.
b Differences due to a hairstyle choice.
c Differences due to inherited genes.
Answer: c Differences due to inherited genes.
Gene flow or gene migration is an important source of genetic variation. It is a movement or transfer of genes from one population to another. It can take place between two populations of the same species through migration and is brought by reproduction and vertical gene transfer from parent to offspring.
According to the joint recommendations of an expert group that included the academy of nutrition and dietetics, an endurance athlete who weighs 75 kg should consume at least _____ g of protein daily. 80 100 110 90
what tissue is responsible for holding together the intestines
There is no evidence indicating that cigarette smoking has skin-aging effects. true or false
A male mouse that is heterozygous for a mutant igf2 allele (igf2/igf2-) is crossed with a female who is homozygous for the wild-type igf2 allele. what would be the expected outcome of this cross?
A male mouse that is heterozygous for a mutant igf2 allele (igf2/igf2-) is crossed with a female who is homozygous for the wild-type igf2 allele. The expected outcome of this cross would be fifty percent of homozygous wild type and fifty percent of heterozygous mutant species.
Further Explanation:
The allele that codes the particular phenotype which is most common in a population is called the wild type allele. Mutant allele is referred as different type of allele from wild type. Wild type is dominant in nature. A recessive trait is defined as a trait that gets expressed by an individual when they show a homozygous recessive condition. This means that if an individual showing a recessive trait will definitely possess both the recessive alleles for that trait as recessive trait gets concealed by the presence of allele for dominant trait.
If the wild/normal gene is igf2 and the mutated gene is igf2-, then the genotype of the parent would be:
Male: igf2 / igf2, possible gametes: igf2 and igf2- Female: igf2 / igf2, possible gamete: igf2Then the resultant cross gives fifty percent of heterozygous for a mutant (igf2/igf2-) and fifty percent of homozygous for the wild-type (igf2/igf2).
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Answer Details:
Grade: High School
Subject: Biology
Topic: Wild and mutant type
Keywords:
Male, female, homozygous, heterozygous, wild, mutant, allele, recessive, dominant, gene, trait, individual, genotype, phenotype, same, genetic makeup, organism.
Describe the similarities and differences between cellular respiration and fermentation.
Both cellular respiration and fermentation use sugar, amino acids, and fatty acids as building blocks to create ATP, but their processes and the amount of energy they release are different. 3. While fermentation only generates 2 ATP, cellular respiration generates 38 ATP.
What fermentation ?Through the activity of enzymes, fermentation is a metabolic process that results in chemical changes in organic substrates. It is specifically described in biochemistry as the process of obtaining energy from carbohydrates without the presence of oxygen.
Fermentation may be divided into three primary categories: lactic acid fermentation, ethanol fermentation, and the creation of hydrogen and methane gas.
Similar to burning, cellular respiration causes the full oxidation of glucose into CO2 and water. Contrarily, fermentation only partially oxidizes glucose. Instead, waste is created in the form of tiny, reduced organic molecules.
Thus, glucose is released into the cell's respiration process more often than it is into fermentation.
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What type(s) of endocrine cells are glandular and produce pth?
Chief cells are the cells which form parathyroid glands and have a role in the synthesis and release of parathyroid hormone (PTH). Parathyroid glands are endocrine glands located in the neck, more precisely located on the back of the thyroid gland. The hormone of this gland is parathyroid hormone and together with calcitonin (a hormone made by the thyroid gland) have key roles in regulating the amount of calcium in the blood and within the bones.
How gas exchange occurs when circulartory and respiratory system work together?
_______ is a liquid produced by the kidneys, collected in the bladder and excreted through the urethra. A) Blood B) Plasma C) Sweat D) Urine
Urine is a liquid produced by the kidneys, collected in the bladder and excreted through the urethra.
Answer: Option D
Explanation:
In our body, presence of urinary tract filters extra fluid and other substance from the blood. The substances get excreted from our body in the urine type.
Urine, a liquid generated by the kidneys, accumulates in bladder, and then excreted from the urethra. Urine used to remove excess minerals and to remove blood cells from body. The urinary tract consists of the kidneys, urethra, bladder and ureter.
The urinary systems function in conjunction with other systems of the body to handle homeostasis. The kidneys play as the important organs of homeostasis. They balance acid-base and water-salt in the blood.
Which describes herbaceous stems
soft is the answer for sure
What is not a function of the skeletal system?
a) providing movement
b) protecting organs
c) storing minerals
d) making vitamins
Answer:
Making Vitamins
Explanation:
The skeletal system performs crucial functions such as providing movement, protecting organs, and storing minerals. However, it does not synthesize or generate vitamins. Other body parts such as the skin and gut bacteria are responsible for vitamin synthesis.
Explanation:The skeletal system in our body performs several crucial functions, including providing structural support that enables movement, protecting our vital organs, and serving as a storage system for essential minerals like calcium and phosphorus. However, one task it does not carry out is the synthesis or making of vitamins. This is a function usually associated with other parts of the body, such as the skin (for Vitamin D synthesis) or the bacteria in our gut (for certain B vitamins and Vitamin K).
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If heart muscle is deprived of oxygen for too long, it will start to die through a process called A. lymphedema. B. arrhythmia. C. atherosclerosis. D. infarction
Plants maintain homeostasis by _____.
How can producers make the most profit? check all that apply?
Answer:
2,3,5
Explanation:
2 : They can work to decrease their marginal cost
3 : They can raise prices to increase marginal revenue
5 : They can also keep the marginal cost below marginal revenues
What type of immune response is shown in Figure 35–2?
nonspecific response
humoral response
cell-mediated response
inflammatory response
Answer: Cell mediated response
Explanation: Since its the virus infecting the cell, the immune cells involved would be those which can enter the cell to kill the pathogen. Only cytotoxic T-cells cells can enter the affected cells and kill the pathogen. In humoral response, B cells are involved but these are not present in the image.
If atp accumulates in a cell select one:
a. the cell receives a signal that there is a need for more energy.
b. feedback inhibition speeds up cellular respiration.
c. feedback inhibition slows down cellular respiration.
d. the rate of cellular respiration does not change.
The correct answer is option c: feedback inhibition slows down cellular respiration.
Cellular respiration is a critical metabolic process that generates ATP, the energy currency of the cell. When ATP accumulates, it indicates that the cell currently has sufficient energy. As a result, feedback inhibition mechanisms will act to prevent the unnecessary production of more ATP, and therefore slow down cellular respiration. This process ensures efficient energy management within the cell, preventing wasteful energy production and ensuring that resources are not depleted. It’s essentially a self-regulating mechanism that cells employ to maintain energy balance and support various cellular functions such as anabolism and catabolism of macromolecules.
What are the small sacs at the end of bronchioles where gas exchange occurs called?
according to the second law of thermodynamics, which is a requirement for the thermal energy to flow from colder objects to hotter objects?
Answer: work must be done on the system
Explanation:
The second law of thermodynamics is the fundamental law of nature; it states that energy can be transferred from cold objects to hot objects only, if work is done on the system. If energy is added to the system then as a result the thermal energy would increase. Second law of thermodynamics is used to determine whether a process is spontaneous or not.
Wilts, wood rot, sooty molds, rusts, and smuts. These are all types of plant diseases caused by what?
Over time, dissolved magnesium concentration in a lake has reached equilibrium. input is from streams draining into the lake; magnesium is removed by precipitation in lake sediments. if wastewater discharge upstream doubles the rate at which magnesium is delivered to the lake,
Which process would release energy from gold, fission or fusion? from carbon?
Fragile X syndrome is a sex-linked disorder found mostly in boys, characterized by mental impairment, large ears, a long face, heart defects, and flat feet. It is caused by a mutation to the gene shown in the picture above. The codon CGG is abnormally repeated many times, causing the cell to inactivate the gene. Such a mutation is known as a(n)
A) insertion.
B) inversion.
C) deletion.
D) duplication.
Correct answer: D). Duplication
It is a disease that is caused by the repetition of codon for many times, which will lead to inactivation of gene that is required for the proper function of brain and other body functions. It is a sex linked genetic disorder, which is caused to to lengthening or expansion of genes.
In these disease the codon triplet CGG is repeated several times, which causes mutation in the gene CFR1. The main symptoms of this disease is mental impairment and heart problem etc.
"which aspect of language is most frequently impaired after traumatic brain injury"
Some fish and amphibians have _____, which detect electrical fields that help them navigate through dark, murky waters. studysoup.com
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High tide are experienced 12 hours apart for a certain coastline. Which of the following best explains the reason for this phenomenon?
The coastline experiences tidal bulge twice a day.
The coastline experiences tidal bulge once a day
. The coastline comes in a straight line with the moon once.
The coastline becomes 90 degress with the moon twice.
a} The coastline experiences tidal bulge twice a day.
i just did this test so it should be right :)
In heterosporous plants, _______ produce _______. select one:
a. microgametophytes; eggs
b. microgametophytes; sperm
c. microgametophytes; eggs and sperm
d. megagametophytes; sperm
e. megagametophytes; eggs and sperm
In heterosporous plants microgametophytes produce sperm.
What are heterosporous plant ?
Heterosporous refers to the plants producing different types of spores that are different in structure, size and function.
What does heterosporous plant produce?
In heterosporous plants, there are two sizes of spores; the smaller (a microspore) produces a male gametophyte, and the larger (a megaspore) produces a female gametophyte.
Hence ,the correct option is B
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The oxygen content in the atmosphere of the early Earth is thought to have increased significantly once which of these developed?
f Photosynthetic bacteria
g Amino acids
h Mitochondria
j Archaebacteria
What causes the frequent migration of animals in africa?
Answer:CHANGES TO NATURAL RESOURCES
Explanation:
APEXX
What does muscle tissue have the ability to do that other tissue types do not?
In a recent experiment, anti-bacterial hand sanitizer was compared to hand soap. Students washed their hands using the sanitizer or soap and warm water for two minutes; then they dried their hands with a paper towel. The standard of comparison was rubbing hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then drying with a paper towel. The sanitizer advertisement claimed to kill bacteria more effectively than any soap. After washing, hands were swabbed and then the swab applied to a culture plate and incubated. Finally, the bacterial cultures were counted and recorded in the data table. Students concluded that the hand sanitizer was most effective in killing bacteria.
How would you respond to the students' conclusion?
A) The conclusion is valid; the sanitizer plates had higher numbers.
B) The conclusion is not valid; there were fewer bacteria cultures on the soap plates.
C) The conclusion is not valid because the warm water was as effective as the sanitizer.
D) The conclusion is valid because the sanitizer had a better kill rate than the soaps.
The conclusion about the effectiveness of hand sanitizer should be based on the actual data from the culture plates. Overusing antimicrobial soap may lead to increased infection risk due to bacterial resistance. Hand washing is critical for preventing the spread of infectious diseases.
The students concluded that hand sanitizer was most effective in killing bacteria compared to hand soap and warm water alone. However, to validate the effectiveness of hand sanitizer, we would need to examine the actual results from the culture plates. If the sanitizer plates had a higher number of bacteria than the water alone, then the conclusion that sanitizer is more effective is not valid. On the other hand, if the sanitizer plates had fewer bacteria than the ones from the soap, then option D would be correct. According to research, though, there's no substantial evidence that triclosan-containing soaps are more effective at reducing disease transmission compared to traditional soap. Therefore, the conclusion may not be valid if we consider the broader implications of such antibacterial products on health.
Moreover, the overuse of antimicrobial soap and sanitizers can potentially increase the risk of infection. This is because it can lead to bacteria developing resistance to antimicrobial agents, thereby making infections harder to treat. It's essential to also consider that frequent hand washing is crucial for preventing the spread of pathogens, and while antibacterial agents have their place, they should be used judiciously.