Probes for cloned genes use ____
a. complementary nucleotide sequences tagged with a detectable label
b. specific antibodies that kill all the cells
c. specific enzymes that lyse all the cells
d. certain bacteria that glow when they take up the genes
e. DNA ligase
ANSWER: a
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Eukaryotic flagella differ from bacterial flagella because only eukaryotic flagella
A. are long, whip-like structures. B. facilitate phototaxis. C. facilitate chemotaxis. D. contain microtubules. E. are used for cell motility.
The principle that states that different homologous chromosomes travel randomly to different ends of the cell is ________
Fill in the blank(s) with correct word
Male frogs give calls that attract female frogs to approach and mate. Researchers examined mating calls of closely related tree frogs in South America
If reinforcement is occurring, what would you expect if you compare the calls of the two species in zones of sympatry versus zones of allopatry? A) Calls would be about the same in both areas. B) Calls would be more similar in areas of sympatry. C) Calls would be more different in areas of sympatry.
The meshwork that forms the fabric of a blood clot is
A) chymotrypsin. B) fibrin. C) thrombin. D) prothrombin. E) collagen.