Most bacterial and archaeal cells divide by ________.
A. binary fission
B. mitosis
C. meiosis
D. All of the choices are correct.
Answer: A
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Fluoroquinolones are known to damage tendons and nerves in patients taking the drug. Side effects from quinolones are unavoidable because ________.
A. they inhibit DNA synthesis, and bacteria and eukaryotes carry out very similar mechanisms for DNA replication B. they inhibit protein synthesis in bacterial cells, which simultaneously disrupts protein synthesis in the host, preventing the production of cartilage C. they disrupt folic acid synthesis, and both bacteria and humans require folic acid for growth D. their mechanism of action is to disrupt cytoskeletal fibers in bacteria, which correlates to connective tissue in humans
Which pair of words is incorrectly matched?
a. tail end ? posterior b. mesoderm ? muscles c. coelom ? n? body cavity d. deuterostomes ? radial cleavage e. triploblastic ? bilateral organism
What are genetically engineered plants or animals that contain a gene from another organism called?
a. trans-cloned organisms b. transformed organisms c. transgenic organisms d. none of the above
What is the structure through which water enters the water vascular system of a sea star?
a. ampulla b. radial canal c. madreporite d. ring canal