<span>Perhaps surprisingly, lakes and rivers constitute a tiny proportion of the world's total freshwater, so answer (b) is correct. Most of the freshwater on our planet is in fact locked up in ice and glaciers, some 68%. The majority of the rest, 30%, is actually underground, in springs and other groundwater feeders. That leaves just 2% that makes up all the rivers, lakes, ponds and other visible freshwater reservoirs that we see in our day-to-day lives.</span>
I think its O+ but im not sure. Sorry if its correct.
Answer:Cold air is heavier that warm air
Explanation:
False. Respiration is providing oxygen for the cells and getting rid of the carbon dioxide, while digestion is transforming food into usable energy.
Answer:
C) The amino acid methionine will not bind.
Explanation:
The tRNA has a nucleotide sequence that varies in length from 73 to 93 nucleotides. The 3' end of the tRNA serves as an amino acid arm. All the tRNA molecules have the trinucleotide sequence CCA at the 3' end. The base "A" is present at the 3' end. The amino acid arm serves to carry a specific amino acid according to the anticodon sequence present in its anticodon arm.
The amino acid is esterified by its carboxyl group to the 2'- or 3'-hydroxyl group of the adenine residue that is present at the 3' end of the tRNA. Therefore, the removal of 3' AC would not allow the tRNA to bind to its corresponding amino acid (here, methionine).
