Which one of the following human organ systems is mainly made up of glands and hormones?
a.) endocrine system
b.) excretory system
c.) nervous system

How do chloroplasts set plants apart from other living things

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Select the correct answer from each drop-down menu proteins are