1. natural selection acts on existing traits because you can not evolve into something you didn't have
2. original structures evolve to accomplish new function in order to survive
Answer:
An energy pyramid is a model that shows the flow of energy from one trophic level to the next along a food chain. The pyramid base contains producers—organisms that make their own food from inorganic substances. All other organisms in the pyramid are consumers
Explanation:
It is important because it breaks down the food eaten by the animals into nutrients which are needed for their bodies to function well. Not only it is important to animals but also to humans. <span>Food and drink must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body.</span>
Answer:
1.barrel cactus 2.creosote bush 3.joshua tree 4.palo verde 5.soaptree yuca 6.gila monster 7.bobcat
Explanation:
they all live in the desert pluse they all benifit from each other. hope this help and sorry if is not corect I just used my knowlege.
