Answer:
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All living cells need energy to function in order for the chemical reactions occurring in the cells to take place. In humans this energy is obtained by breaking down organic molecules such as carbohydrates, fats and proteins.
Sexual means something physical and sexual reproduction is the creation of an offspring.
Denaturing. This step occurs at around 95C. This causes the double strand Helix to spectate
The part of the brain that performs that function is the hypothalamus.