In seed plants, which develops into a pollen grain?
a. megaspore
b. microsporangium
c. microspore
d. female gametophyte
e. megasporangium
ANSWER: c
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Which of the following health problems might be cured with embryonic stem cell treatment? a. Muscular dystrophy b. All of these choices
c. Heart disease d. Parkinson's disease e. Blindness
Which is incorrect about inducible operons?
A. They have genes turned off by a buildup of end product. B. They are turned on by the substrate of the enzyme. C. They include the lac operon. D. They are often for use in catabolic pathways. E. They are normally turned off.
I am characterized by having a test and axopods. Who am I?
a. green algae b. actinopods c. opisthokonts d. stramenopiles e. foraminiferans
The epidemic relapsing fever in humans is transmitted by
A. hard-shelled ticks B. body louse C. direct contact D. soft-shelled ticks