A chromosome contains one long DNA strand.
B.
Answer: D) By decreasing the activation energy of a reaction
A catalyst is a substance that speed up the rate of chemical reaction without affecting the product of the reaction. They only affect the rate of reaction not the yield of reaction.
Catalyst provide an alternative reaction pathway that has lower activation energy than that of uncatalysed reaction. It increases the frequency of collision and because of these greater collision which lowers the activation energy of the reaction.
Answer:
I know melanin is responsible for the eye color.
Answer:
Since the dog watches her leave and is sad realized that her grabbing the cat keys signals that she is leaving because it is one of the last things she does before she leaves
