The origin of a new plant species by hybridization coupled with nondisjunction is an example of
A) allopatric speciation.
B) sympatric speciation.
C) autopolyploidy.
D) heterochrony.
E) habitat selection.
Answer: B) sympatric speciation.
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Louis Pasteur's most famous success was his work on
A) Mycobacterium tuberculosis. B) the rabies vaccine. C) optical isomers. D) cultivation of E. coli.
Which of the following is evidence that the
continents are not static?
a. the jigsaw puzzle fit of continents like South America and Africa b. fossils occur in identical rock formations on both sides of the Atlantic Ocean c. magnetic poles of large rock formations point in different directions d. at certain places beneath the ocean, the sea floor is spreading e. all of these are evidence that the continents are not static
Which of the following is the most suitable for
conversion to agriculture? a. grassland b. tropical forests c. deciduous forest d. prairie e. coniferous forest
Neurotransmitters categorized as inhibitory are expected to _____
A) act independently of their receptor proteins B) close potassium channels C) open sodium channels D) hyperpolarize the membrane