Dunaliella salina is a bacterium that is able to live in aqueous solutions with such high salt concentrations that the salt cannot fully dissolve. D. salina is an example of a(n)
A) extreme thermophile.
B) extreme halophile.
C) methanogen.
D) proteobacteria.
Answer: B
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The Human Genome Project:
A. included significant contributions from 20 sequencing centers distributed around the United States. B. was an international collaboration among 20 sequencing centers located in six nations. C. used DNA from the coordinators of the project, James Watson and Francis Collins. D. used James Watson's DNA, in honor of his contributions to solving the three-dimensional structure of DNA. E. took longer than anticipated, requiring over 20 years to complete.
Why didn't Darwin's contemporaries readily accept his theory of natural selection?
a. There was strong evidence for inheritance of acquired traits. b. There was a lack of fossil evidence. c. Darwin did not provide a plausible theory of heredity. d. There was strong evidence for the principle of use and disuse. e. Darwin did not provide evidence for artificial selection
A ?COOH group is a(n) ____ group
a. carboxyl b. hydroxyl c. amine d. methyl e. carbonyl
Despite evidence to the contrary, many scientists during the mid-twentieth century remained convinced that
____________________ were the carrier of genetic information. Fill in the blank(s) with the appropriate word(s).