Fact 1: Fertilization occurs when a sperm and an egg fuse to form a diploid zygote.

Fact 2: If a human ovum is fertilized, a zygote is formed.

Given the two facts above, answer the question "What forms a zygote?" with the following options: 
- amoeba
 - ovum
 - Fe
 - seeds
 - fungi
 - wheat
 - nektar
 - pollen


 

  ovum       