Answer & explanation:
The primary structure of a protein can be defined as the main chain of the protein formed by the binding of amino acids and which shows the sequence in which they appear is called the primary structure of the protein.
The secondary structure usually results from the hydrogen bonds that occur between the hydrogen (H) of the amino group (-NH) of one amino acid and the oxygen (O) of the carbonyl (C = O) of another.
The most common secondary structures are alpha helices, which look like springs (found in the keratin in our hair) and the beta pleated sheets, like folded sheets of paper (an example is the fibroin found in a spider's web or the cocoon of a moth).
The tertiary structure is formed when the primary structures of proteins fold over themselves.
This structure is usually the result of sulfur bonds, known as disulfide bonds, but other bonds, such as those made by metal atoms, can occur.
An example of a tertiary structure protein is <u>myoglobin</u>, which acts as a reserve of oxygen in the muscles of mammals.
Answer:
Humans
Explanation:
A new research now suggests that possibly the entire animal kingdom, including humans, shares important genetic mechanisms with sea sponges. Now published in the journal Science, the discovery has been made by a team of scientists led by Dr. Emily Wong from the Victor Chang Cardiac Research Institute and UNSW Sydney.
Answer:
The correct answer is d. suggests that the time since divergence may not be sufficient for complete reproductive isolation to have occurred.
Explanation:
Polar bears are evolved from brown bear and grizzly bears are subspecies of brown bear so polar bears and brown bears are different species. These two species habitat is different so they are geographically isolated but due to the melting of ice by global warming, their niche started overlapping.
Commonly they do no reproduce with each other because of the reproductive isolation but they can produce viable hybrids called growlers and pizzlies if interspecies reproduction takes place which shows that the time interval since divergence is not enough that can make these two species completely reproductive isolated. So the right answer is d.
Answer:
Your answer should be D or C. Likely D.
