Answer:
testing to see if it has cells
Explanation:
More advanced than tools used on earth
Cell membrane is a semipermable, which means that certain molecules will be able to pass through the membrane. It is contains phospholipids. But for smaller molecules such as CO2 and Water, it can pass through the membrane through simple diffusion. Cell membrane controls the movement of the materials into and out of the cell.
Explanation:
The answer is A.
When the body temperature returns to normal,the respiratory system sends a message to the skeletal system to stop shivering.
