For number 8:
all radio waves,
infrared radiation,
visible light,
ultraviolet radiation,
X-rays,
gamma rays.
The independent variable is the caffeine.
it controls the bpm.
Answer:
B. ATP
Explanation:
The ATP is the type of useful energy that the cells need.
1.It is not natural.
2.It can came up with side effects and unbalance some species.
The ability to reproduce i think is the answer
