In DNA, adenine from one strand binds to ______ in the complementary strand.
A) thymine
B) guanine
C) cytosine
D) deoxyribose
E) adenine
A) thymine
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Urticaria is characterized by
A. living in Utica. B. wheal and flare. C. asthma. D. inflammation.
Which statement is true of polytomy branches?
a. Organisms in each branch share a common ancestor. b. Polytomy represent mass speciation from a single mutation event. c. The longest branch is the ancestor of the other sister taxa. d. Polytomy branching only occurs in single-celled organisms.
When a farmer grows cotton containing the gene for Bt toxin, they often leave a strip of non-Bt cotton around the outside of the field for what reason?
A. because the non-Bt cotton does not drive the moths and caterpillars to extinction B. because the non-Bt cotton grows better C. to allow some RR bollworm caterpillars to survive and limit selection pressure for resistance D. to allow some rr bollworm caterpillars to survive E. to allow the non-Bt and Bt cotton plants to cross-pollinate
If you found a fish floating on the water covered with a white fuzzy material and tiny dark spheres you would suspect that the fish has been infected by a (an)
a. diatom. b. euglenoid. c. water mold. d. cynanobacterium.