Which statement best describes the relationship between nematodes and bacteria when used to protect crops?
A) Both bacteria and nematodes are always harmful to crops.
B) Nematodes make a home for bacteria, removing harmful bacteria from insects in the process.
C) Neither bacteria nor nematodes have any value for pest control.
D) Nematodes provide a home for bacteria, and bacteria provide nutrients for nematodes.
The correct answer is: D) Nematodes provide a home for bacteria, and bacteria provide nutrients for nematodes.
Explanation: In agriculture, certain nematodes and bacteria can work together symbiotically. Nematodes can create a habitat for specific beneficial bacteria, which can help break down organic matter and release nutrients. In return, these bacteria can provide nutrients that support the growth of nematodes. This mutual relationship is beneficial for pest control and can help protect crops.