The correct answer is: Natural selection acted on the variation that was present in the population.
Answer:
In the α helix structure, there is a hydrogen bonding between oxygen atom in a carbonyl of one amino acid and the hydrogen atom of the amino group that is situated four residues farther along the polypeptide chain
Explanation:
The common secondary structure of protein are: <em>α helix and β pleated sheet</em>
<em>α helix </em>is a rod like structure.<em> </em>It is a<em> right handed coil </em>of amino acid residue on a polypeptide chain, which may be 4 units or 40 units long. The coil is held together by hydrogen bond between oxygen atom in a carbonyl of one amino acid and the hydrogen atom of the amino group that is situated four residues farther along the polypeptide chain. This means that every complete turn of the helix is only 3.6 residues.
The two sources of heat in the earth's interior are-
A. The leftover heat from formation and radioactive decay
Explanation:
The leftover heat from the time when the planet was formed, which has not yet been lost, is a source of internal heating of the earth. There are various radioactive elements present deep inside the earth and they are decaying slowly and gradually and emit heat into the earth's interior.
Movement is the main function of muscular tissue. They have the ability to contract and this is what brings about the movement of body parts. They also help to maintain body posture and position.
Answer: Among the detailed categories of proximate causes for all regions, the extension of overland transport infrastructure, followed by commercial wood extraction, permanent cultivation, and cattle ranching, is the leading proximate cause of deforestation.
