Because the is impermeable to water, water and minerals cannot pass directly into the root xylem of the vascular cylinder except by .

One of the reasons that stars are so large is because

What will happen if two of the base pairs of the stand of the dna are switched

During photosynthesis, hydrogen ions are most directly used to in the chloroplast pictured above. a) make glucose b) make chlorophyll c) produce carbon dioxide d) drive the production of atp