What are the two principle factors that lead to microevolution?
A. Horizontal gene transfer and evolutionary mechanisms
B. New genetic variation and gene duplication
C. New genetic variation and evolutionary mechanisms
D. Natural selection and migration
Answer: C
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An example of an anabolic metabolism reaction is
a. monosaccharides + monosaccharides glycogen + H2O b. dipeptide amino acid + amino acid c. glycerol + 3 fatty acid molecules 3H2O + fat molecules d. glycogen many monosaccharides
The first life-related and carbon-based molecule, ____, was synthesized in vitro by a German chemist in 1825
a. RNA b. DNA c. protein d. urea e. ozone
Scientists hypothesize that ____ served as a primitive template for forming polymer chains from organic subunits,
such as amino acids.
a. meteorites that landed in the oceans b. clay particles in tidal flats c. sulfur that precipitated out of hydrothermal vents d. rusty rocks e. magma spewed from early volcanic activity
Using only the information provided in the paragraph, which of the following is the best initial hypothesis for how D. santomea descended from D. yakuba?
A) allopolyploidy B) autopolyploidy C) habitat differentiation D) sexual selection