Answer:
B. introns; exons
Explanation:
Related genes from different organism usually translate to proteins of indispensable functions. This means that the proteins must be similar in terms of amino acids produced. Therefore the coding region must be highly conserved. These can be found in the introns. Conversely, exons are not a part of the coding sequence and therefore not required for translation. These sequences may be less conserved.
The answer would be the cell wall or the cell membrane
Pacific Coast. As this area is in the bottom left and therefore has the highest hazard according to the key.
Disease and food shortages would keep the numbers down because of the increase in life.<span />
