It’s is B i took the test
A cell is a unit of structure and function in all living things. The division of a cell into two daughter cells with the same genetic material
You could argue that in early succession areas species may have not been adapted or evolved. In Darwin's theory, life began in a shallow, warm pond. If that is the case, species would then venture deeper when their area they are in is suitable and having success
Cardiac output, peripheral resistance, hormonal changes coming from glands, blood volume & blood viscosity