Carbon 14 is an unstable isotope of carbon that decays very slowly. Compared to the common, stable carbon 12 isotope, carbon 14 has two additional ______________
(a) electrons.
(b) neutrons.
(c) protons.
(d) ions.
(b)
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Which protist would most likely be phytoplankton?
A. Kelp (a brown seaweed) B. Plasmodium falciparum (the pathogen that causes malaria) C. Polysiphonia (a red seaweed) D. Euglena (a unicellular alga) E. Phytophthora infestans (the pathogen that causes late-blight)
When a structural gene is under positive inducible control, what would be the result of a mutation that eliminates the activator protein?
A. The transcription of the structural gene will not be affected, as an activator is not required. B. Since transcription will require an activator protein, the transcription will be turned off. C. The mutation will lead to activation of a repressor upon the lack of an activator protein, which will block transcription. D. More cAMP will be produced in a cell to compensate for the lack of an activator protein. E. The structural gene will be constitutively expressed due to the lack of inducible control.
Microevolution is change in the __________ of a population.
Fill in the blank(s) with the appropriate word(s).
Generally speaking, the term for the process by which two species drive each other's evolution is:
A) mutualism. B) coevolution. C) competition. D) succession.