Answer:
D. organ systems
Explanation:
Organs and tissues that perform the same function are called organ systems
Answer:
Black fur is more fit to survive in the environment than other colors of fur.
Explanation:
"Fitness", in terms of natural selection, is an organism's likelihood to survive in a given environment. Assuming that the increase in black fur is significant (Not attributable to pure chance), we can safely assume this is because Black Fur provides a competitive advantage in said environment over other colors of fur. There may be black terrain that allows them to blend into the environment and ovoid predators, or maybe it keeps them warmer if it is located in a cold region, thereby reducing the amount of resources they need to spend to stay warm.
The number of oxygen atoms in a molecule
Answer:
Well the only organelle that produces ATP/cellular energy is the mitochondria so via process of elimination you would conclude mitochondria are most abundant in muscle cells.
