Fact 1: Roundworms reproduce sexually.

Fact 2: Sexual reproduction involves karyogamy and meiosis.

Given the two facts above, answer the question "Roundworms reproduce using meiosis and what?" with the following options: 
- karyogamy
 - pollen
 - survive
 - reproduce
 - allow growth
 - Energy
 - Leptospirosis
 - seeds


 

 karyogamy        