Electron microscopes differ from light microscopes in that
A. electrons replace light.
B. electromagnets replace glass lenses.
C. resolution is higher.
D. magnification is higher.
E. All of the choices are correct.
E
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The lateral line is:
A. a lateral stripe on the side of male fish that aids in sex-recognition B. a series of sensory organs that detects pressure waves in the water C. the row of fins along the sides of eels D. the row of pharyngeal slits along each side of the heads of fish E. the row of small blocks of cartilage along each side of the notochord of agnathan fishes
Embryonic development begins with a single egg fertilized by a single sperm forming a zygote. The
zygote then undergoes mitosis; how many cells would be present at the conclusion of 4 mitotic divisions?
a. 2 b. 4 c. 8 d. 16 e. 32
Which group is not part of the Domain Eukarya?
a. Plants b. Protists with chloroplasts c. Fungi d. Animals e. Heterotrophic bacteria
Kinesin 1 is highly processive motor, taking more than 100 steps (covering 1 ?m along a microtubule) before dissociating, primarily because
A) it hydrolyzes ATP more rapidly than other motors. B) one of its two heads is always attached in it hand-over-hand mechanism. C) light chains at its nonmotor end attach to cargo vesicles. D) its efficiency of converting ATP hydrolysis energy to useful work is 60–70%. E) All are required for processivity.