Questions: 3:53 app.sophia.org Question Tutorials Which of the following is a primary sex characteristic of the male? Adam's apple Penis Facial hair Body hair SAVE CONTINUE Here are all the tutorials from Unit 4. Use them as needed throughout the Unit 4 Milestone. UNIT 4 TUTORIALS

The answer is the second one: Penis.

Explanation for each option:

1. Adam's apple: This is not a primary sex characteristic. It is a secondary sex characteristic that typically becomes more prominent during puberty due to hormonal changes.

2. Penis: This is a primary sex characteristic. Primary sex characteristics are those that are directly involved in reproduction. In males, this includes the penis and testes.

3. Facial hair: This is a secondary sex characteristic. It develops during puberty and is not directly involved in reproduction.

4. Body hair: Like facial hair, body hair is a secondary sex characteristic that develops during puberty.

Summary: Primary sex characteristics are those directly involved in reproduction, such as the penis in males. Secondary sex characteristics, like facial and body hair, develop during puberty and are not directly involved in reproduction.