Answer:
you won't find the nucleus in prokaryotic cells
20 percent available at the highest tropic level. There is less at the top of the food chain because it has ate things from possibly all areas of the food chain and each level is consuming from lower parts of the chain than it. So with the entire food chain eating on what the top eats there is gonna be less for the top
Answer:
Evolution provides evidence as to how animals such as birds are related to much older animals. Over time, species evolve and adapt to their surroundings to suit their habitat. Thus many different species pop up. This all doesn't happen in the blink of an eye, though.
They are considered invasive because they out-compete native fishes for resources
Answer:
Because it is formed by combining two elements i.e carbon and hydrogen.
