Answer:
The prey are usually smaller than the predator so they don't have as much energy.
Explanation:
We know that copper sulfate can be used in an experiment to test whether or not a protein is at hand, etc. Hope this helps!
Active transport.
Passive transport, being its opposite, requires no energy at all. Therefore, active transport would require energy or ATP in order to move across.
Hope this helps!
There are 11 major organ systems in the body.