Necessary because it keeps heat in and keeps the planet at the right temperature for life.
It can harm the planet if more pollution occurs and the greenhouse gas effect traps too much heat and causes global warming
Regulation- the process of the blood sugar becoming regulated by insulin (glucose).
Correct answer is ... Seeds have endosperm which provides nourishment for a new plant, but spores do not have any stored food supplies. :)
Answer:
cellular resperation; ATP;energy;digestive system;circulartory ;energy; glucose; water; carbon dioxyide ; mitocondria
Explanation: