Gradualism and punctuated equilibrium are two ways in which evolution of a species can occur. Gradualism is selection and variation that happens more gradually; over a short period of time it is hard to notice
Answer:
water molecules are cohesive due to hydrogen bonding.
Explanation:
B. the carbon cycle ensures living things have a source of hydrogen
They can be used to produce vaccines.
They can be used to determine the response of tissue to drugs.
They can be used to produce hormones.