The first one is going to be b and the second one is going to be a
<span>The best definition of a fossil is any trace of an organism that lived in the past. Technically, a couple of the other choices (i.e. trace of an organism turned to rock, a hard part of an organism that has been preserved) could be considered within this group.</span>
The molecule that is the primary source of energy in all cells is ATP, which is definitely not a macromolecule. Other primary sources of energy include other sugars, proteins, and fats. Hope this answers the question. Have a nice day.
Answer:
Reproduce.
Explanation:
Almost all living being on the earth has the mentality to continue the race. This is why many say that humans, as well as animals, are sex-driven, and that in growing up, their sexual hormones will also become bigger (until it reaches its peak somewhere around early middle-age). Without this mentality, the group will always die out. Their next mentality is similar, to survive. This mentality essentially is just adding more steps to the first one, to survive long enough to reproduce and continue the race.
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The correct answer is stem cell research and animal testing.
