Which of the following could help solve the problem of groundwater pollution? A.

treatment of wastewater before releasing it into the environment
OB. decreasing the use of synthetic chemical pesticides

C.
maintaining automobiles so their fluids do not leak

D.
all of these

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

dna is a set of a gene held together by a chemical bond