Plant hormones bring about a physiological response in the plant after binding to the nucleus of the plant cells.
a. true
b. false
Answer: b. false
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In jawed fishes, the gills primarily serve which function?
a. gas exchange only b. feeding only c. water elimination only d. both feeding and gas exchange e. waste excretion only
The earliest hominids used tools to
a. assist in locomotion. b. provide protection. c. facilitate the processing of food. d. ward off predators. e. construct shelters.
In addition to showing that DNA carries genetic information, the experiments of Avery, McCleod, and McCarty demonstrated that:
A: DNA is present in bacteriophage. B: DNA may be taken up by bacterial cells and be active. C: DNA is a double helix. D: DNA binds to the cell wall of the bacterium. E: eukaryotic cells may be genetically transformed.
At some point in their lives, all chordates have:
A) jaws. B) a brain. C) a ventral nerve cord. D) gills. E) a dorsal nerve cord.