Some people call Earth the "Blue Planet," why do you think this is? Of all the water on Earth, only about 1% is available for human use. WHY?

I think it's not because of the water we use it's the water we have.

Explanation:

Because our planet is made up of 75% water it is naturally the first thing to recognize.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

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.