Your body systems work together to keep you alive. Each of these systems is made up of organs
with specific functions. The structure of these organs and the cells of which they are made make
them well suited to their function. An important function of your body systems is to supply your cells
with energy and nutrients, and to remove wastes that are produced, thats the best I
have.
The factor that is having a negative influence on her health is the environment. The correct answer is D, environment.
Answer: C. Melatonin.
Explanation: Melatonin is the hormone responsible for sleep and wake cycles. :)
The answer is 10 billion. <span />
I believe it's either microwaves or x-rays
I studied this last year
