Members of the kingdom Protista are
A. always colonial.
B. prokaryotic cells.
C. all photosynthetic.
D. eukaryotic cells.
D. eukaryotic cells.
Biology & Microbiology
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What specialized cells receive and respond to stimuli?
Biology & Microbiology
If the K+ channels of an excitable plasma membrane were blocked by the action of a drug, which process(es) would be
disrupted?
a. repolarization b. depolarization c. hyperpolarization d. repolarization and depolarization e. repolarization and hyperpolarization
Biology & Microbiology
Transposons may or may not leave a copy behind at the original site, whereas retrotransposons always leave a copy behind at the original site.
a. true b. false
Biology & Microbiology
Which of these groups is characterized by a lack of symmetry (neither radial nor bilateral)?
A) Cnidarians B) Chordates C) Arthropods D) Flatworms E) Sponges
Biology & Microbiology