Question

Which statement is true about sperm and egg cells?


a) Both sperm and eggs can swim using flagellum.


b) A sperm cell and an egg cell combine to form a sex cell.


c) Eggs use flagellum to move towards the sperm, which are stationary.


d) Sperm are continuously produced by males, while a female is born with a full supply of eggs.

Answer 1

The correct statement about sperm and egg cells is: Sperm are continuously produced by males, while a female is born with a full supply of eggs. (Option D)

Here are some key points that explain why this statement is true:

• Sperm and eggs are the two types of sex cells, or gametes, that are involved in sexual reproduction.
• Sperm are produced in the testes of males through a process called spermatogenesis. This process begins at puberty and continues throughout a man's life, allowing him to produce millions of sperm every day.
• In contrast, females are born with a finite number of eggs that are stored in their ovaries. This number varies among individuals but can range from a few hundred thousand to a million.
• During a woman's reproductive years, a small number of eggs are released from the ovaries each month in a process called ovulation. If one of these eggs is fertilized by a sperm, it can develop into a fetus.
• As women age, the number and quality of their eggs decline, which can make it more difficult to conceive.
• Sperm and eggs have different structures and functions. Sperm are tiny, mobile cells that are equipped with a tail-like structure called a flagellum that propels them forward. They are designed to swim through the female reproductive tract and reach the egg for fertilization.
• Eggs, on the other hand, are much larger and stationary. They are equipped with a protective outer layer called the zona pellucida, which must be penetrated by a sperm in order for fertilization to occur.

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