If one insect needs 25 pieces of plant material to live how many drops of methylmercury end up in its body?

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?

All organisms contribute some water to the water cycle by conducting

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).