Regulation of cardiac output is controlled by the cardiovascular center of the brain.
a. true
b. false
Answer: a. true
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In addition to visual comparison, which of the following would be the best way to determine that S. niagarae and S. yellowstonensis are separate species?
a. Look for the presence of chloroplasts b. By the presence of a silica shell c. By their location in different lakes d. Compare their DNA sequences e. Carbon date them
Which classification is the best description of humans?
a. herbivore b. carnivore c. omnivore d. decomposer e. photosynthetic organism
Which of the following supports the idea that land plants arose from green algae?
A) Green algae live in freshwater environments, and plants require fresh water. B) Both utilize chlorophylls a and b. C) Both photosynthesize. D) Both are multicellular. E) Both contain lignin in their cell walls.
The stomata open depending on the following conditions, except ____.
A. when the guard cells are swollen with water B. decreased turgor in guard cells C. low carbon dioxide level in the leaf D. voltage change in guard cell membranes stimulated by sunlight E. hot, dry environment