Which best explains why blood and the cytoplasm of cells are mainly composed of liquid water?
a. water is a common substance and is readily available.
b. water is an important transport and reaction medium.
c. water prevents biological reactions from occurring readily.
d. water prevents turgor pressure from making the cells too rigid.

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

What is the most stable monatomic ion formed from nitrogen

Which of the following nuclei would be the least stable a 2 protons, 2 neutrons b 1 proton 1 neutron c 1 proton 3 neutrons d 1 proton 2 neutrons