Chloroplasts - found only in plants and algae. they convert solar radiation energy to chemical energy usable for the cell's metabolism.
mitochondria - found in both plants and animals, they produce energy (in the form of ATP - chemical compound) by decomposing sugars and fats. they use up oxygen to do it.
Maybe immune system and respiratory system
Well scientists will be able to study organisms more efficiently, and they will be able to organize them into groups based on their cell structure, behavior, habitat, similarity, and more.
False..the energy was depleted just a little..lets say a wolf comes and eats the rabbit..then the energy in the rabbit from grass will deplete a little more and so forth if a human comes and kills the wolf and eats it...the energy always goes down a bit