Question

union of a sperm and an egg is known as
multiple choice
blastocyst.
fertilization.
holistic.
implantation.
secretion.

Explanation:

Fertilization is the process where a sperm cell fuses with an egg cell, combining their genetic material. A blastocyst is a stage of embryonic development after fertilization. Holistic refers to considering the whole, not related to the union of sperm and egg. Implantation is when the fertilized egg attaches to the uterine wall. Secretion is the release of substances by cells or glands, not relevant here.

Answer:

B. fertilization.