C clouds
Clouds form when the invisible water vapor in the air condenses into visible water droplets or ice crystals
There would be 40 units of energy left, because 10% is lost each time.
Answer:
that's very broad, is that the whole question?
Mechanisms of gene regulation include: Regulating the rate of transcription. ... Regulating the processing of RNA molecules, including alternative splicing to produce more than one protein product from a single gene. Regulating the stability of mRNA molecules.
Because there is only a finite amount of energy. Energy is lost between each trophic stage. The top predator would gain the least amount of energy, shared between the least amount of organisms within the predator species. Typically there just aren't any other animals that can kill and eat the top predator, but there also wouldn't be enough of the top predator to eat so any species above them would quickly die out.