According to the modern synthesis, macroevolution results from ____
a. abrupt changes in a species environment
b. the chance appearance of “hopeful monsters”
c. changes in genes that occur in spurts
d. abrupt changes in an individual’s genetic make-up
e. the gradual accumulation of microevolutionary changes
ANSWER: e
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A long-term goal(s) of the bioinformatic analysis of a pathogenic bacterium is
A. identification of molecules that could be used as targets by antimicrobial agents, or develop or improve a vaccine. B. identification of molecules that can be passed to a new host. C. assembly of accurate and complete genomic nucleotide sequences. D. identification of molecules that could be used to treat genetic disorders.
Fluorescent in situ hybridization (FISH) would be helpful in determining
A) the location of B-DNA and Z-DNA. B) the position and structure of nucleosomes. C) the position of particular chromosomes or sequences inside the nucleus. D) the base composition of a DNA sample. E) the number of nuclear pores on the nuclear envelope
You examine the fossilized remains of the winged animal. Impressions in the surrounding rock suggest that the wings may have been covered with tiny hairs, which suggests that the animal is likely to have been a mammal. When you examine the remains of the
wings, which of the following observations would be most surprising? A) Several of the digits ("finger" bones) are extremely long, and look as if they supported a thin membrane. B) The animal appears to have five digits in each forelimb. C) The animal appears to have two upper arm bones. D) The animal's wings appear to be much larger than those of any known bat.
Which of the following pathways are operational in a cell growing via fermentation?
A) glycolysis, intermediate step, and the Krebs cycle B) glycolysis and intermediate step only C) glycolysis D) intermediate step E) Krebs cycle