Genetic Evidence Suggests That Insects Have Evolved from Crustaceans

question 21

Essay

Genetic evidence suggests that insects have evolved from crustaceans. What is a reason that insects are so much smaller than crustaceans?

---

Definitions:

Cortisol

A hormone released by the adrenal glands in response to stress or low blood glucose.

Blood Sugar

The concentration of glucose in the blood, an important energy source for the body's cells.

Hypothalamus-Pituitary-Adrenal Cortex

A major part of the endocrine system that controls reactions to stress and regulates many body processes including digestion, the immune system, mood and emotions.

Hormonal-Pubertal-Adrenal Circuit

A system involving the interaction of hormones associated with puberty and the adrenal glands, affecting physical development and stress responses.