I think C because to not get lightheaded, you need blood to go to your brain and if you're exercising and you feel light headed or dizzy, you wouldn't be able to exercise!. So from my understanding, the answer would be C but I am not 100% Hope this helps! :)
- enzyme pepsin: chemically digests the proteins in the food, breaking down into amino acids
- hydrochloric acid (strong acid): provides an acid environment for pepsin and kills bacteria (food); without this acid, the stomach could not function properly.
Answer:
DNA cloning allows a copy of any specific part of a DNA or RNA sequence to be selected from the millions of other sequences in a cell and produced in unlimited amounts in pure form.
Hope this helps :)
Answer:
Mass extinctions, like the one that killed the non-bird dinosaurs, leave behind a host of empty niches — unoccupied ecological real estate. The upshot of all these processes is that mass extinctions tend to be followed by periods of rapid diversification and adaptive radiation.
Explanation:
