B. sexual selection, which alters allele frequencies in the gene pool.
Answer:
A. People cut down the trees in a forest, leaving less habitat for squirrels.
Explanation:
A large percentage of the depletion of an ecosystem can be attributed to anthropogenic or human activities. Ecosystems are naturally known to support or inhabit life. For example, many trees in an ecosystem are homes to living organisms such as birds, insects, snakes etc.
However, according to this question, an exemplary description of how humans can decrease an ecosystem's ability to support life is when "people cut down the trees in a forest, leaving less habitat for squirrels". This act will decrease the forest's ability to support life.
Protein, the building blocks of proteins are amino acids, different sequences and combinations of these amino acids result in huge numbers of proteins which have a variety of functions.
I think the correct answer from the choices listed above is the second option. In order for us to see an object that is non-luminous, it must reflect some of the light it receives from a luminous source, such as the Sun. Hope this answers the question. Have a nice day.<span>
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