Which of these adaptation(s) is (are) unique to
mammals?
a. hair or fur
b. four types of upper and lower teeth that match
up
c. sweat glands
d. secretion of milk by females
e. all of these
Answer: e
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Each of the following is an essential feature of electron transfer from water to NADP+ except
A) PSII. B) PSI. C) coenzyme Q. D) plastocyanin (PC). E) cytochrome b6/f complex.
A microbiologist is conducting a research project on chemolithoautotrophs. This means that the investigator is examining certain aspects of a bacterium that
A. is a purple nonsulfur bacteria which depends on light. B. can oxidize inorganic molecules such as ammonia and sulfur for energy. C. can use the energy from sunlight to build organic molecules from carbon dioxide. D. uses light as its energy source and carbon for organic compounds. E. obtains carbon from organic molecules.
A population of lizards lives in a rocky area next to a desert. Some lizards are light colored and blend into the sand. Others are dark and blend into the rocks. What is likely to happen to this population of lizards over time?
A. They may remain one species as a result of stabilizing selection. B. They may remain one species as a result of directional selection. C. They may remain one species as a result of disruptive selection. D. They may evolve into two separate species as a result of disruptive selection. E. They may evolve into two separate species as a result of directional selection.
What is the biological significance of genetic diversity between populations?
A) Genes for traits conferring an advantage to local conditions make microevolution possible. B) The population that is most fit would survive by competitive exclusion. C) Genetic diversity allows for species stability by preventing speciation. D) Isolated populations become more fit. E) Diseases and parasites are not spread between separated populations.