There are many, and since you didn't specify the choices, some examples include "ff" or "dd" or just two lowercase letters.
Explanation:
The effect of the neurotransmitters tends to be fast, as in a case of external stimuli, which leads to a quick reaction of the body, towards that stimulus.
The effect of a hormone, however, is long-lasting, where hormones actually are working on the metabolic or structural situations, which are going to have a long-lasting effect on the body.
Answer:
Sexual Reproduction
Explanation:
Since sexual reproduction automatically causes genetic diversity(crossing over, DNA from both parents, etc.) it produces desirable traits for organisms. Asexual reproduction does not bring in new and desirable traits and is more of a copy of the parent.
If the lion stored 100 energy units, then the zebra had 1000 energy units.