Gene flow contributes to allopatric speciation
a. true
b. false
Ans: b. false
Biology & Microbiology
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Chemical energy is most often released by ________.
A. adding phosphate groups to a molecule B. creating a bond between two molecules C. breaking a bond within a molecule D. reorganizing molecules with each other
Biology & Microbiology
A cancer's spread is called
A) metastasis. B) malignancy. C) carcinogenesis. D) microstasis.
Biology & Microbiology
What is the half-life of the decay of uranium
238 to lead 206?
a. 2.5 million years. b. 220 million years. c. 1.2 billion years. d. 2.5 billion years. e. 4.5 billion years
Biology & Microbiology
What form of nitrogen can most plants absorb and use directly?
A) nitrite and nitrate B) nitrate only C) ammonium and nitrogen gas D) nitrate and ammonium
Biology & Microbiology