Fact 1: Roundworms reproduce sexually.

Fact 2: Roundworms make up the roundworm phylum, Nematoda.

Given the two facts above, answer the question "What reproduces sexually?" with the following options: 
- viruses
 - humans
 - insects
 - orchids
 - the Sun
 - Nematoda
 - ferns
 - plants


 

      Nematoda   