The presence of branchial clefts in a human embryo suggests

1 answer:

8 0

Humans, as an embryo, temporarily have gills.

Branchial clefts are often a common birth defect and are actually looked at as “human gills” for a small period of time until they develop further into the jaw and inner ear bones. If they do not change into those two structures, the lesions can take the form of cysts and form in the neck or just below the collarbone, causing infection that could soon seep out of the skin.

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Questions

bonufazy [111]

The species will be stressed

5 0

3 years ago

The enforcement of hunting regulations are conservation measures that promote the A. use of biological controls. B. fur industry

sdas [7]

Answer:

the answer is D: the the preservation of species

Explanation:

3 0

3 years ago

Read 2 more answers

The total number of organisms an ecosystem can support is its tolerance range. True or false

Monica [59]

Answer;

The above statement is false

The total number of organisms an ecosystem can support is its carrying capacity.

Explanation;

-Carrying capacity is the average population density or population size of a species below which its numbers tend to increase and above which its numbers tend to decrease because of shortages of resources.

-For a given region, carrying capacity is the maximum number of individuals of a given species that an area's resources can sustain indefinitely without significantly depleting or degrading those resources.

The carrying capacity is different for each species. in a habitat because of that species’ particular food, shelter, and social requirements.

6 0

3 years ago

Read 2 more answers

Why does synthetically produced RNase refold incorrectly if the reducing agent is removed before urea removal?

olya-2409 [2.1K]

<h2>Disulfide bonds interaction </h2>

Explanation:

The high concentration of urea causes unfolding of protein and thus results in loss of function of a protein. The urea interacts with the protein and prevents the folding of a protein.
During oxidation, the disulfide bonds that are required for proper functioning and stabilization of protein are formed, while in the presence of urea, the disulfide bonds are not positioned correctly. The protein oxidation results in covalent modification of a protein that results in the change of physical and chemical properties of a protein.
The change of physical and chemical properties of protein after oxidation and in the presence of urea cannot be modified even after the removal of urea. Thus, protein does not fold properly.
Hence the right answer is "disulfide bonds are not positioned correctly rather than week bonding interaction"

6 0

3 years ago

Select the correct statement about cellular respiration.

weeeeeb [17]

I dont want to mislead you, but I believe the answer is A because letter B is wrong because plants go through cellular respiration and photosynthesis, whereas animals go through cellular respiration but not photosynthesis, and for C, I've never heard of that so it doesnt seem likely.

6 0

3 years ago