Why do islands often make good "laboratories" for studying the mechanisms of extinction?
a. Island species tend to be especially resilient to extinction.
b. Islands tend to harbor endemic species.
c. Island populations of a species are good representatives of the same species' continental popu-lations.
d. Biological communities of islands are less complex than the biological communities of conti-nents.
e. B and D,
E
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The good thing about conventional oil and gas energy production and distribution is that they are protected against global climate change
Indicate whether this statement is true or false.
Which of the following would not be found in a vial containing DNA?
a. nucleotides b. phosphate c. adenine d. uracil
The ____ have a single, circular chromosome
a. Archaea b. Bacteria c. Archaea and Bacteria d. cyanobacteria only e. methanogens only
The rate of diffusion through a semipermeable membrane will be lowest when ____
a. molecules are small b. there is a concentration gradient c. there is a difference in charge d. there is high pressure e. temperatures are low