<span>"D.how living things are interconnected with their environment</span>" is the correct answer. Ecology has to do with systems of environments as a whole, and the organisms that live there.
Phosphorus is an essential nutrient for plants and animals. Phosphorus is a limiting nutrient for aquatic organisms. Phosphorus forms parts of important life-sustaining molecules that are very common in the biosphere.
The answer is A. The ratio goes down as the size of the cell gets larger.
It's the mitochondria, the "powerhouse of the cell".
Out of the bear, elephant, badger and hamster, the one that is least like the others is the elephant. The elephant is not furry and has no hair like the other animals listed. Elephants also have a trunk and not a nose. The elephant also doesn't have claws like the other animals. All of the animals listed are mammals since they give live birth to their young.