Answer:
D. Natural selection
Explanation:
Natural selection supports this theory.
Answer:
Sperm and egg have 23 the number of chromosomes as a body cell.
Hope this helps =)
In biology, the active site is the region of an enzyme where substrate molecules bind and undergo a chemical reaction. The active site consists of residues that form temporary bonds with the substrate (binding site) and residues that catalyse a reaction of that substrate (catalytic site).
It is D.) because it would sit there forever to who knows. There is always something that is used from something according to the food chain. Take a dead bird for example. Consumers would not want to eat a bird that has no nutrients that is alive. So this is when decomposers swoop in. Maggots, fungi, worms etc. decompose the dead body and if is was fungi, the nutrient will go into the soil and the process starts again providing nutrients to plants.
Fossil fuels carbon. they are using two different types of method into research paleontology