What mechanism explains why polar bears are white and bears found farther south have a darker color?
A. continental drift
B. inheritance of acquired characteristics
C. the common genetic language
D. natural selection
D. natural selection
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Which one of the following statements about Pax6 and eye development is incorrect?
A. Binding of Pax6 protein to the cisregulatory elements of its target genes results in activation of some genes and repression of others. B. The specific program of eye development for a given species depends on the genes downstream of Pax6 in that species' genome. C. In the fruit fly, the total number of genes downstream of Pax6 that are needed for eye development is approximately 2000. D. Some of the genes influenced by Pax6 protein are activated or repressed indirectly by other transcription factors "turned on" by Pax6. E. The downstream target genes for Pax6 protein in different organisms are all very similar.
The dietary carcinogen aflatoxin can be found in
A) fresh fruits. B) red meats. C) salt. D) alcohol. E) raw peanut butter.
Several human disorders are caused by DNA repair pathway deficiencies. Choose one and describe: (1) what the deficiency is and (2) how the defect affects people with the disease
What will be an ideal response?
Based upon today’s molecular evidence, Homo sapiens appear to have originated from:a
Europe. b. Indonesia. c. East Africa. d. South Africa. e. South America.