I believe it would be D, since the animals that had more food, and a advantage, would produce and so on.
OK the the answer you are looking for will be the excretory system because that is the system that releases waste.
comes from the earth's crust<span />
Answer:
A scope built of two systems of lenses ... ==> Compound light microscope
Explanation:
Answer:
The stem cells differentiate into chondroblasts. 3. These chondroblasts, located at the periphery of the old cartilage, begin to produce and secrete new cartilage matrix. As a result, they push apart and become chondrocytes, each occupying its own lacuna.
Explanation: