Multiple choice

Which of the following organisms is free living?

  1. Tapeworm

  2. Earthworm

  3. Liver fluke

  4. Ascaris

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earthworms are free-living annelids that inhabit soil and feed on organic matter. Tapeworms and liver flukes are parasitic flatworms (Platyhelminthes). Ascaris is a parasitic roundworm (Nematoda). Free-living means the organism is not dependent on a host for survival.