A and C because they are the same
C.The unique role the species plays in an ecosystem .
Answer:Answer: Since certain bases always appear in pairs, they will have equal percentages of the DNA composition. The percentage of adenine will equal the percentage of thymine, and the percentage of cytosine will equal the percentage of guanine. Together, these percentages will add to 100%
Explanation:
A. the volcanic eruptions of Mt. Vesuvius
The primary source of energy for almost every ecosystem on Earth is the sun