Species are disappearing almost a thousand times faster than they are forming. What is the main cause?

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.

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.

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.

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.

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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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

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.

soft         is the answer for sure

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.

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:

Then 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.

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.

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.

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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Answer: The duodenum

Explanation:

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.

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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a} The coastline experiences tidal bulge twice a day.

i just did this test so it should be right :)