It would be 60 as cytosine and guanine are complementary bases.
Answer:
Overproduction: Many organisms have many offspring, but not all will survive.
Genetic Variation: Individuals range withing a certain population
Struggle to Survive: Organisms compete for resources such as food, shelter, and most of all mates. They tend to have to keep themselves safe and stay away from predators.
Explanation:
This pretty much sums up the natural selection process
A is the correct answer because the graphs show that summers have high temperatures and little precipitation.
The answer is C hope this helps