Q1. Both the endocrine and nervous system are main regulating systems of the body though the nervous system has been compared to an airmail delivery system and the endocrine system to the pony express. Briefly explain the comparison.

Q2. What is one role of disaccharides?

What is one main role of polysaccharides?

Which polysaccharide serves this idea in plants?

Which polysaccharide serves this reason in animals?

What is a second key role of polysaccharides?