Which is a nonpoint source of pollution?
A. Tourists throw trash into the ocean.
B. A car mechanic pours oil on the ground.
C. Rain contains chemicals that seep into the ground.
D. A pipe dumps waste from a factory into a stream.

The answer would be C.

Explanation:

Because rain does not count as pollution.

A. Tourists throw trash into the ocean.

Explanation:

Excess fertilizers, herbicides and insecticides from agricultural lands and residential areas. Oil, grease and toxic chemicals from urban runoff and energy production. Sediment from improperly managed construction sites, crop and forest lands, and eroding stream banks.

answer'(basidium)the spore--bearing structure of a basidiomycete is called a basidiocarp; ///

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.