Answer the following questions true (T) or false (F)
1. What causes geographic isolation for one kind of organism may not be isolating for another kind of organism.
2. Speciation can occur without dramatic anatomical or genetic change.
3. Speciation can never occur unless populations become separated by a geographic barrier.
1. TRUE
2. TRUE
3. FALSE
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Although it is said that the twentieth century was the Age of Physics, it is predicted that the twenty-first century will be the age of
A. chemistry. B. computers. C. microbial biodiversity. D. mathematics.
How many protons are in the nucleus of a
phosphorus atom?
a. 5 b. 7 c. 10 d. 15 e. 30
"Sticky ends" are:a
the single-stranded ends of a DNA segment created by some restriction enzymes. b. a problem in recombinant DNA technology because they form loops of single-stranded DNA. c. double-stranded ends of a DNA segment created by some restriction enzymes. d. sites of the origin of replication in prokaryotes.
e. sugar molecules that are bound to the ends of a DNA fragment.Which of the following is NOT a major terrestrial biome of Earth?
A. the temperate grasslands B. the tundra C. the taiga D. the Antarctic E. the tropical rain forest