Tuesday
March 3, 2015

Homework Help: Science - Biology

Posted by Rana on Monday, October 6, 2008 at 10:36pm.

After spraying crops with DDT for several years, farmers found that populations of insect pests rebounded. One reason was that the insects had developed resistance to the insecticide. Suggest another reason, based on what you know about populations, pyramids, predators, and competitors.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

science - after spraying crops with ddt for several years, farmers found that ...
Ecology - After spraying crops with DDT for several years, farmers found that ...
ecology - after spraying crops with ddt for several years, farmers found that ...
ecology - After spraying crops with DDT for several years, farmers found that ...
biology - a farmer sprays insecticide on his crops and notices that the insect ...
biology - A farmer sprays insecticide on his crops and notices that the insect ...
Science - fill in the blank questions monotremes, marsupials, and placentals ...
Science - 1.)When evaluation was first processed which of the following was ...
biology - some species of insects e.g butterflies, are found in greater numbers ...
agriculture science - 1.)state the cautions that farmers should have with their ...

Members