Question

The life span of an unfertilized egg is
A. Two days
B. One hour
C. One day
D. One week

Answer 1

Hint: Every month, the egg is released from the ovary and moves into the Fallopian tube for fertilization and if the egg isn't fertilized during that point, it disintegrates. The lifetime of that unfertilized egg is definite after it leaves the ovary.

Complete answer: The ovum (plural ova), is the female germ cell, or gamete, in most organisms (anisogamous organisms that reproduce sexually, where the female gamete is usually smaller than the male one).
Once the egg has matured and is released from the ovary during ovulation, it goes into the Fallopian tube where it lives for 12 to 24 hours.
Conception is feasible if sperm is already present within the fallopian tubes when the egg is released, or if a lady has sex while the egg is alive, causing sperm to swim up through the uterus and into the Fallopian tube.
Sperm can reach the egg in almost half an hour.
When the egg and sperm fuse during fertilization, a diploid cell (the zygote) is made, which rapidly grows into a replacement organism.

So, the correct answer is option C. One day.

Note: It is important to note that eggs will lie dormant for years or maybe decades before they start to mature. For eggs to finish their journey to ovulation, they receive a sign to start their final maturation process about 150 days before they might be released from the ovary.