21. To reduce the dependence on diffusion, multicellular organisms have A. Reduced cell size and number of cells
B. Developed thinner cell membranes
C. Developed other internal transport systems
D. All of the above

Christie's doctor recommends that she eat 40 grams of protein a day. she's already consumed 50% of her protein recommendation for the day. how many servings of the given snack should christie have to meet her daily protein recommendation?

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.