The red pigment in erythrocytes is whitch transports oxygen.
a. hemoglobin
b. phycoerythrin
c. carotenoid
d. chlorophyll

Which of these is the most likely consequence of falling petroleum price

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry