Which of the following is directly concerned with reproduction?
A) complex changes in hormones
B) primary sex characteristics
C) secondary sex characteristics
D) the onset of menarche

Question

Quizplus · Accepted Answer

Primary sex characteristics refer to the organs and structures involved in reproduction, such as the testes and ovaries. Therefore, primary sex characteristics are directly concerned with reproduction. Complex changes in hormones (A) and secondary sex characteristics (C) are also related to reproduction, but not as directly as primary sex characteristics. The onset of menarche (D) specifically refers to the beginning of menstrual cycles in females, which is a part of reproductive function. However, it is not as directly associated with reproduction as primary sex characteristics.

Which of the Following Is Directly Concerned with Reproduction