How many progeny phage are released when a single E. coli cell is lysed by phage T4?
A) between 1 and 10
B) between 10 and 100
C) between 100 and 1,000
D) about 10,000
E) about 100,000
C) between 100 and 1,000
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When the SRY gene of the Y chromosome becomes active (around 7 weeks),
a. the Müllerian and Wolffian ducts both develop into male reproductive structures. b. the Müllerian ducts develop into male reproductive structures and the Wolffian ducts disappear. c. the Müllerian ducts disappear and the Wolffian ducts develop into male reproductive structures. d. the Müllerian and Wolffian ducts both disappear. e. the Müllerian and Wolffian ducts both develop into female reproductive structures.
Members of what group are multicellular producers?
a. animals b. protists c. fungi d. plants e. bacteria
When a person receives a sudden, large dose of ionizing radiation, all of the following might be expected to occur
EXCEPT ____. a. serious infections b. intestinal hemorrhages c. anemia d. wounds that do not heal e. increased antibody production
What part of the brain is highly developed in animals that have finely tuned balance and complex coordination?
A) cerebellum B) medulla C) thalamus D) temporal lobe