Before contact with Europeans, a tiny, isolated group of South Pacific islands had a population of about 50,000 people. Because of poor management of their own resources, the population fell to around 5000 by about the year 1750
When Europeans finally arrived, they brought smallpox, and after the ensuing epidemic, only about 800 islanders were left alive. The unusual genetic makeup of the native population is due to what phenomenon? A) genetic drift
B) bottleneck effect
C) gene flow
D) speciation
B
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Identify the form of male genital cutting, common among some tribes in central Australia, which involves a slit being made on the lower side of the penis along its entire length and to the depth of the urethra.
A. Supracision B. Supercision C. Subincision D. Superincision
Which of the following observations is not part of natural selection as posed by Darwin?
A. Individuals within a population differ in terms of reproductive success. B. Individuals within a species exhibit variation. C. Organisms compete for available resources. D. Organisms become adapted to conditions as the environment changes. E. All of these observations are part of natural selection as posed by Darwin.
Some proteins are important biological buffers because:a
they react with water to produce carbon dioxide, which neutralizes acids. b. they contain acidic as well as basic groups. c. they are able to absorb great amounts of carbon dioxide during condensation reactions. d. they produce carbonic acid upon hydrolysis. e. they contain nonpolar groups that exclude water molecules
During ________, a ribosome assembles a polypeptide whose amino acid sequence is specified by the nucleotide sequence in a molecule of mRNA.
A. translation B. posttranscriptional modification C. replication D. transcription