What benefits would cause an athlete to risk taking erythropoietin or a similar drug?
What will be an ideal response?
This will stimulate an increase in red blood cells and the increase in oxygen delivery to the tissues could improve athletic performance.
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Beetle pollinators of a particular plant are attracted to its flowers' bright orange color. The beetles not only pollinate the flowers, but they mate while inside of the flowers. A mutant version of the plant with red flowers becomes more common with the passage of time. A particular variant of the beetle prefers the red flowers to the orange flowers. Over time, these two beetle variants diverge from each other to such an extent that interbreeding is no longer possible. What kind of speciation has occurred in this example, and what has driven it?
A) allopatric speciation; ecological isolation B) sympatric speciation; habitat differentiation C) allopatric speciation; behavioral isolation D) sympatric speciation; sexual selection E) sympatric speciation; allopolyploidy
An animal that is evolved for rapid movement over the ground will have relatively ____ bones
a. heavy and thick
b. heavy c. light and thin d. light e. heavy and thin
Mammals that lay eggs are
A. monotremes. B. birds. C. placentals. D. bats. E. marsupials.
Which pair of enzymes is necessary to make recombinant DNA?
A) Restriction enzyme and DNA ligase B) DNA polymerase and RNA polymerase C) DNA polymerase and DNA ligase D) Restriction enzyme and DNA polymerase