Question

1. the primary male sex hormone responsible for the development of male secondary sexual characteristics is (1 point) a estrogen b testosterone c insulin d adrenaline 4. a teenage girls first menstruation is called: (1 point) a menarche b spermarche c puberty d adrenarche

Explanation:

1. Testosterone is the primary male sex - hormone responsible for the development of male secondary sexual characteristics. It promotes the growth of male reproductive organs, body hair, and muscle mass during puberty.
2. Menarche is the term used to describe a teenage girl's first menstruation. It is an important milestone in female puberty.

Answer:

1. B. Testosterone
2. A. Menarche