What are the areas around the world called that contain a extraordinary amount of biodiversity,
compared to other regions in the world?

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

The image shows a group of fish. the type of social behavior shown in the image is called