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:
Sample Response: The first stage of cellular respiration occurs in the cytoplasm. This is where glucose is broken down into smaller molecules. A small amount of energy is also released. The second stage occurs in the mitochondrion. This is where the small molecules combine with oxygen to produce water, carbon dioxide, and a large amount of energy.
Explanation:
Answer:
D) Pressure from water that flows into the plant cells
Explanation:
An organism<span> is a living being that has a cellular structure and that can independently perform all physiologic functions necessary for life. In </span>multicellular organisms<span>, including humans, all cells, </span>tissues<span>, </span>organs<span>, and </span>organ<span> systems of the body work together to maintain the life and health of the </span>organism<span>.</span>