A group of tissues working together is an organ.
ANSWER:
A. an organ
They both use the same muscle tissue known as the heart muscle which it is powered by.
Active transport is the moving of molecules across the membrane of the cell against the concentration gradient with the use of ATP.
Low to high concentration. Concentration gradient is the diffusion (movement of molecules from regions of low concentration) from high to low with the gradient. Active transport is from low to high, against the gradient.
Answer:
your answer is c
Explanation:
i dont know how to explain
