2. Which of the following best describes the permeability of the cell membrane? A. All substances can pass directly through the membrane
B. No substances can pass directly through the membrane
C. Some substances can pass directly through the membrane, especially small nonpolar
molecules
D. Some substances can pass directly through the membrane, especially large polar
molecules
Can

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

Explain the significance of thesaurus geographicus

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d