Chitin Is a Long-Chain Polymer Derived from Glucose

question 21

Multiple Choice

Chitin is a long-chain polymer derived from glucose. It strengthens cell walls of fungi and the outer covering (exoskeleton) of arthropods (including crabs, shrimps, and insects) . The presence of chitin in these groups is likely the result of which of the following processes?

• A) secondary endoparasitism
• B) horizontal gene transfer
• C) paraphyletic evolution
• D) convergent evolution

---

Definitions:

Urinary System

The organs of the body involved in the production, storage, and expulsion of urine.

Diuretic Drugs

Medications designed to increase the amount of water and salt expelled from the body as urine.

Blood Volume

The total amount of blood circulating within an individual's vascular system.

Postglomerular Blood

Blood that has passed through the glomeruli of the kidneys, where filtration of blood takes place.