Which of the following does not tend to promote speciation?
A) the founder effect
B) gene flow
C) natural selection
D) polyploidy
E) disruptive selection
Answer: B
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Two characters that appear in a 9:3:3:1 ratio in the F2 generation should have which of the following properties?
A) Each of the traits is controlled by single genes. B) The genes controlling the characters obey the law of independent assortment. C) Each of the genes controlling the characters has two alleles. D) Four genes are involved. E) Sixteen different phenotypes are possible.
What is happening here? "W" represents any molecule and e- represents an electron. W ® W+ + e-
A. oxidation of W B. reduction of W C. hydrolysis of W D. None of these choices is correct.
A resting heart rate that exceeds 100 beats per minute is called ________.
A) hypercardia B) hypertension C) tachycardia D) bradycardia
When using ________ as a terminal electron acceptor, Thiobacillus can sequentially reduce nitrate to nitrogen gas in a process called ________. Certain Thiobacillus species can also chemolithotrophically use ________ as an electron donor.
What will be an ideal response?