The answer is D. Mutualism is the symbiotic relationship when both organisms benefit. Predation is not a symbiotic relationship. Parasitism is the symbiotic relationship where one organism benefits and the other is harmed.
To carry out different functions in the body
Answer:
A concentration gradient will be developed.
Explanation:
1. When the oxygen concentration is more outside a cell, then by the process of diffusion the oxygen will pass into the cell.
2. Diffusion can be described as a process in which molecules move from a higher concentration to a lower concentration i.e. along a concentration gradient. Hence, this process does not require energy.
3. When the oxygen concentration will be more in a cell then again through diffusion the oxygen will move out of the cell.
