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

Fact 2: Fertilization occurs when the egg and sperm fuse and join.

Given the two facts above, answer the question "What happens in the archegonium?" with the following options: 
- eggs separate
 - Earth orbiting the Sun
 - sperm and egg fuse
 - competition
 - fallopian tubes join
 - permineralization
 - It expands
 - cloning


 

   sperm and egg fuse      