Fact 1: Fertilization occurs when sperm swim to an egg inside an archegonium.

Fact 2: Gametes in males are called sperm, and in women commonly referred to as eggs.

Given the two facts above, answer the question "What occurs when a male gamete swims to an egg?" with the following options: 
- permineralization
 - competition
 - movement
 - rapid expansion
 - fertilization
 - birth
 - copulation
 - ovulation


 

     fertilization    