Does the body/biological clock help with sleep stages?

YES

Explanation:

Understanding your body's internal clock—or circadian rhythm—is the first step to better sleep. Your circadian rhythm (also known as your sleep/wake cycle or body clock) is a natural, internal system that's designed to regulate feelings of sleepiness and wakefulness over a 24-hour period.

d. in sexual reproduction, offspring have more chromosomes than

either parent.

asexual reproduction results in offspring which are genetically the same as the parent organism (not counting a rare mutation). sexual reproduction produces a random mixture of the genetics derived from both parents

explanation:

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies