Question

1. what happens to the egg if it is not fertilized within 48 hours of ovulation?

a. it travels back to the ovary.
b. it disintegrates.
c. it continues to develop in the fallopian tube.
d. it triggers a second ovulation.

1. how often does the menstrual cycle typically occur?

a. every 14 days
b. every 21 days
c. every 28 days

Explanation:

Question 4

In the female reproductive system, after ovulation, the egg (ovum) moves into the Fallopian tube. If it is not fertilized within about 24 - 48 hours (the window for fertilization), it does not travel back to the ovary, continue developing in the tube, or trigger a second ovulation. Instead, it disintegrates and is eventually expelled or absorbed. Option a is incorrect as the egg doesn't go back to the ovary. Option c is incorrect as it can't develop further without fertilization. Option d is incorrect as one ovulation cycle doesn't trigger another ovulation in this context.

The typical menstrual cycle in humans occurs approximately every 28 days, although this can vary slightly from person to person (ranging from 21 - 35 days for most). Every 14 days is close to the time of ovulation within a cycle, not the cycle length. Every 21 days is shorter than the typical average cycle length.

Answer:

b. It disintegrates.

Question 5