13. Why were some pesticides such as DDT removed from public use?
a. they can cause heart disease
b. they can cause diabetes
c. they can cause meningitis
d. they can cause cancer

d. they can cause cancer

Explanation:

(DDT) is a chemical which is used as a pesticides. DDT is an organic compound which has no smell, no colour and no taste. This chemical is banned because it causes cancer disease in human as well as pollute the environment. Pesticides are used to kill harmful insects so DDT is used for it but when people know that they cause cancer disease, they are banned.

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.