B) They permit exchange between the external atmosphere and the circulatory system.
Answer:
A plant and animal cell both have a plasma membrane, ONLY a plant cell has a cell wall. Both of them have cytoplasm, a nucleus to guide them on what to do and ribosomes to produce protein. Only a plant contains a large vacuoles to store water and have chloroplast to do photosynthesis.
Explanation:
Answer:
A cell cannot do anything that a larger organism can because the cell are what make up a organism.
Explanation:
Answer:
The left side of the heart receives oxygenated blood from the pulmonary vein and pumps it into the aorta, while the right side of the heart receives deoxygenated blood from the vena cava and pumps it into the pulmonary vein. The pulmonary vein and aorta also have valves connecting them to their respective ventricle.
Explanation:
Answer:
C
Explanation:
A system is at equilibrium when the rates of opposing reactions are equal.
Answer A does not show the rate of reactions, it only shows concentrations of reactants.
Answer B only shows constants, it does not show rates of reactions.
