Which of the following factors is LEAST likely to attract pollinators to a flower?
A. the amount of nectar
B. odor
C. color of the flower in visible light
D. color of the flower in UV light
E. taste of the ovules
E. taste of the ovules
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A length of DNA is shown below with the vertical lines labeled 1-3, representing restriction sites. Only restriction site 2 is polymorphic. What are possible band sizes on a Southern blot if the probe hybridizes to region X?
A. 2 kb B. 2 kb, 5 kb C. 2 kb, 3 kb D. 2 kb, 3 kb, 5 kb
Human eye color is the result of
A) polygenic inheritance. B) sex-linked recessive inheritance. C) codominance. D) genes and environmental effects. E) simple dominance.
In 1938, scientists found a population of coelacanths in the Indian Ocean. This fish species is considered a "living fossil" and appears not to have changed morphologically for 80 million years. This discovery supports the ________ model of evolution.
A. punctuated equilibrium B. common descent C. gradualism D. natural selection E. adaptation
These biological compounds are nonpolar and insoluble in water
A. nucleic acids B. lipids C. carbohydrates D. proteins