Answer:
c is the answer............
It should be A) cell since everything is made of cell in a living body.
Answer:
Neurons and muscle cells perform different functions, however they have the same DNA (genetic material) contained within them.
The function of muscle cells is to mechanically contact to allow the body to move in space.
The function of nerve cells is to send and receive signals. in order to trigger an event or elicit a response.
Explanation:
The answer should be proteins. Because the protein is consists of different kinds of amino acids(usually 20 in total). And our cell can not produce essential amino acids itself.