AP BIOLOGY

Detailed explanation-1: -External fertilization is a mode of reproduction in which a male organism’s sperm fertilizes a female organism’s egg outside of the female’s body. It is contrasted with internal fertilization, in which sperm are introduced via insemination and then combine with an egg inside the body of a female organism.

Detailed explanation-2: -In vitro fertilization (IVF) is the joining of a woman’s egg and a man’s sperm in a laboratory dish. In vitro means outside the body. Fertilization means the sperm has attached to and entered the egg.

Detailed explanation-3: -Internal fertilization happens inside the body, for example, mammals having sex or artificial insemination to create an embryo. External fertilization happens outside the body, for example, fish spawning in a river or in vitro fertilization.