The immediate source of energy that powers a cell activities is

a) adenosine triphospate
b) food
c) adenosine diphospate
d) sugar

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

What was the land like over 500 million years ago? what was under the sea?

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight