What is the cell membrane made of? check all
that apply.
o proteins
o cellulose
o carbohydrates
a lipids

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?

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?