A normal plant cell holds water in the vacuole of the cell. This large organelle also gives the cell support. Suppose a plant is submerged in salt water. As a result, the vacuoles collapse and the leaves wilt. This condition is called plasmolysis. Which explanation do you think best describes what happens to the cells of that plant during plasmolysis? A. The water diffuses out of the cell to equalize the solute concentrations.
B. The water diffuses into the cell to equalize the solute concentrations.
C. The solute (salt) moves inside the cell to equalize the solute concentrations.
D. The solute (salt) pushes on the vacuole of the plant cell causing it to collapse.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

answer: b

coz red blood cells marrow and circulates the body for 120 days.

food source and hunting?