In freshwater microorganisms, an organelle known as the contractile vacuole regulates the flow of water into and out of the cell. What conditions would cause this organelle inside of the cell to fill with water? A) The concentration of water is greater outside of the cell than inside of the cell
B) The temperature of the water inside the cell is greater than outside of the cell
C) The water pressure is higher outside of cell

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

trachea, alveoli, lung capillaries, arteries

the answer would be   10%

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.