When you cut into most active plant tissue, water appears almost immediately because plant cells contain

If a selectively permeable membrane separates a molasses solution from distilled water, over time the

A cell is placed in a solution of large carbohydrate molecules tagged with a red dye. Soon the cell is dark red, showing a concentration of the nutrient much higher than the external solution. We add a reagent that blocks the use of ATP. What result would you expect from this experiment?

Enzymes have “specificity.” This means that they

Which of the following is consistent with the laws of physics governing energy?

During what stage of meiosis do sister chromatids separate from each other?

Each enzyme has a particular substrate because enzymes

Assess the following statement for accuracy: All of the energy that a plant stores in the bonds of glucose is available to an animal to power its muscles.

When water enters a plant cell

While science cannot describe “thinking” in physical terms, we are certain that the process involves metabolism inside brain cells. With positron emission tomography (PET scan), it is possible to inject short-lived isotopes and image the regions of the brain that have the most active metabolism during various mental activities. However