A. Immune system
It helps our bodies fight everything that comes in our path.
Answer:
it b or d
Explanation:
that is the most important for scientistes to study
b tells what can be in the fossill or find in the fossill
so i think it b
<h2>overexploitation..</h2>
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing returns. Continued overexploitation can lead to the destruction of the resource. The term applies to natural resources such as: wild medicinal plants, grazing pastures, game animals, fish stocks, forests, and water aquifers.
I googled it and it said it is estimated that 5 percent of human DNA encodes protein. Not sure if it is correct or not.