Red Seal Cosmetology Practice Exam

What describes parasites?

1. Organisms that do not need a host to survive

2. Organisms beneficial to their host

3. Organisms that cause diseases in plants only

4. Organisms that rely on a host for survival while contributing nothing

The correct answer is: Organisms that rely on a host for survival while contributing nothing

Parasites are organisms that rely on a host for survival while contributing nothing, making option D the correct answer. Option A is incorrect because parasites cannot survive without a host. Option B is incorrect because beneficial organisms help their hosts rather than taking from them. Option C is incorrect because parasites are known to cause diseases in both plants and animals.