Question

What did the study in a Pennsylvania forest reveal about the environmental effects of using DDT?
(Points : 1)
DDT caused the birds in the forest to disappear.

DDT killed aphids that ate forest leaves.

DDT killed ladybugs, which caused the aphid population to rise.

DDT killed aphids, which caused the ladybug population to rise.

Answer 1

@jojo4eva

Answer 2

C

Answer 3

@cayennemocha its the third one

Answer 4

. Which of the following was not a scientific finding that led to the ban on DDT?
(Points : 1)
DDT had limited dispersion in the environment.

DDT lasted a long time in the environment.

DDT was biomagnified in the environment.

DDT led to declining bird populations.
@jojo4eva

Answer 5

the first one