__________ would prevent interbreeding between two species of fish living in the same habitat
a. Sympatric isolating mechanisms
b. Equilibrium isolating mechanisms
c. Reproductive isolating mechanisms
d. Allopatric isolating mechanisms
e. Preadaptive isolating mechanisms
C
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Compound B is a ____________________.
Assume that you are taking an organic chemistry class. Your teacher has given you four organic compounds to analyze. She tells you that one is a carbohydrate, one is a hydrocarbon, one is a nucleic acid, and one is a protein. You discover that Compound B contains only carbon, hydrogen, and oxygen. Of the four types of compounds which were given to you to analyze, which one best describes Compound B?
Transcription begins near a site in the DNA called the ______.
A. promoter B. enhancer C. response element D. transcription unit E. regulatory sequence
If A, B, and C are all required for growth, a strain mutant for the gene-encoding enzyme B would be capable of growing on which of the following media?
A. minimal medium supplemented with C only B. minimal medium supplemented with nutrients A and B C. minimal medium supplemented with A only D. minimal medium E. minimal medium supplemented with B only
What type of immunity results from the transfer of antibodies from the mother to the fetus?
a. naturally acquired active immunity b. naturally acquired passive immunity c. artificially acquired active immunity d. artificially acquired passive immunity