Answer:
1. C
2. B
If I'm wrong sorry but overall I think those are the right answers.
Many scientists believe that greenhouse gases<span> are directly causing glaciers in all parts of the world to melt and recede at an unprecedented rate.
This is what these scientists believe. If you had any options, it would be best for you to write them down here.</span>
Answer: 20 amino acids
Explanation: The 20 amino acids that are found within proteins convey a vast array of chemical versatility. The precise amino acid content, and the sequence of those amino acids, of a specific protein, is determined by the sequence of the bases in the gene that encodes that protein.
Only about 3 percent of the worlds water is fresh, and even less than that is usable, because most of it is locked up in glaciers or in permanent snow fields.
The correct answer is D.