It is believed the major reason for the decline in amphibian species is death through disease
b. changing reproductive habits
c. mutation
d. climate change

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

Glucose is broken down in different ways, both in the presence and in the absence of oxygen. using the table for reference, what major products are formed in each reaction set?

Which is one example of a phenotypic change that is not genetic