What are defined as unique heritable characteristics (physical or psychological) that play a factor in the organism's ability to survive and reproduce in its environment?

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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i think the answer is a.keratin is the pigment responsible for skin color.

linnaeus is the father of taxonomy, which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.