People Over the Age of _____ Represent the Fastest-Growing Segment

question 150

Multiple Choice

People over the age of _____ represent the fastest-growing segment of the population in the United States and in most countries around the world.

• A) 50
• B) 65
• C) 70
• D) 85

---

Definitions:

Acrosome

A cap-like structure over the anterior portion of a sperm's head, facilitating the sperm's penetration of the egg.

Enzymes

Organic compounds that markedly increase the speed of nearly all cellular chemical processes.

Zona Pellucida

A thick, glycoprotein layer surrounding the plasma membrane of an oocyte, important for fertilization in mammals.

Testosterone

A steroid hormone responsible for the development and maintenance of male physical characteristics.