Which of the following venation patterns is characteristic of monocot leaves?
a. parallel
b. palmately nettled
c. pinnately nettled

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.