The Probability That an Individual Will Change Class Levels in an Open

question 19

Multiple Choice

The probability that an individual will change class levels in an open class system is __________.

• A) very low
• B) high
• C) low
• D) very high

---

Definitions:

Sexual Differentiation

The process by which the sexual organs and secondary sex characteristics develop differently in males and females, influenced by genetic and hormonal factors.

Trimester

One of the three roughly equal periods into which a pregnancy is divided, each lasting about three months.

Brain Structures

The various parts of the brain, each responsible for different functions, such as the cerebrum for thought and action, the cerebellum for movement, and the limbic system for emotions.

Lateral Hypothalamus

An area of the brain thought to control hunger and thirst; destruction of this area can cause an animal to refuse food and water.