_________________ produces new species and _________________ takes them away.

A. Extinction; speciation
B. Speciation; extinction
C. Background extinction; mass extinction
D. Gradual change; punctuated equilibrium


Answer: B. Speciation; extinction

Biology & Microbiology

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Recent molecular analyses of Rozella allomycis suggest that the phylum ____ is the earliest-diverging clade of fungi

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If a double stranded piece of DNA is amplified by PCR then after 4 cycles there would be _____ copies of this DNA

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Which of the following types of behavior describes the way that mice find their way through mazes?

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