At what stage of meiosis does crossing over occur?
A. metaphase I
B. metaphase II
C. prophase I (Meiosis I)
D. prophase II
Ans: C. prophase I (Meiosis I)
Biology & Microbiology
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The copulatory organ of the earthworm is the
a. penis. b. clitellum. c. gonopodium. d. vestibule.
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All animals
A) are prokaryotic. B) are heterotrophic. C) have cell walls made of chitin. D) obtain food by absorption.
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What is the name of the molecule that binds to CAP to activate transcription of the lac operon?
A) lactose B) galactose C) glucose D) cAMP E) ATP
Biology & Microbiology