Which statement best describes a characteristic of a scientific theory? a.~supported by mathematics to explain a principle of nature b.~a readily demonstrable fact that cannot be disproven c.~an educated guess that is yet to be tested consistently d.~supported by a substantial body of evidence observed in nature

option D is correct .

A scientific theory can be defined as :- an explanation of a feature in the natural worlds that can be repeatedly tested. This can be verified in accordance with scientific method by using different accepted protocols of observation , measurement and result evaluation.

answer; ///i do believe the answer is (virus);

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.