The original source of electrons in the photosystems is:
A) O2.
B) CO2.
C) NADPH.
D) ATP.
E) H2O.
E) H2O.
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Rockweeds overcome the problems of desiccation by:
a. growing only in shaded areas. b. having a gelatinous covering. c. evaporating water from their tissues. d. bending with the waves. e. being covered with a waxy cuticle.
These are characterized by branching, so that one neuron sends messages and has contact with many other neurons
a. axon b. dendrite c. cyton d. glial cell e. ependymal cell
Oxygen, carbon dioxide, as well as other small
molecules, cross the plasma membrane through the process(es) of
a. diffusion. b. osmosis. c. endocytosis and exocytosis. d. active transport. e. facilitated diffusion
Which term refers to the upper angle between a stem and attached leaf?
a. internode b. axillary bud c. node d. lateral bud