The phenotypic ratio resulting from a dihybrid cross of two heterozygote individuals showing independent assortment is expected to be
A) 1:2:1
B) 3:1
C) 9:1:1:3
D) 9:3:3:1
Answer: D
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Which of the following is NOT one of the "Big Five" mass extinctions?
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A time-specific life table is constructed by sampling the
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Bacteria that grow in mine drainage at pH 1-2 are probably which of the following?
A. alkaliphiles B. acidophiles C. neutrophiles D. obligate anaerobes