Ehrlich and Raven proposed an "escape and radiate" hypothesis that predicts that:
A. plants that escape their herbivores will
radiate, increasing diversity.
B. plants that are not eaten will develop more
similar traits.
C. plants and insects co-evolve toward less
species diversity.
D. plants will only win the evolutionary "arms
race" if they escape to new habitats.
E. plants and insects are showing less
diversity through time as each adapts to the
other's defenses.
A
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The structure that covers the opening to the trachea during swallowing, thereby preventing food from entering the air passageway, is the
A. epiglottis. B. cecum. C. rumen. D. uvula. E. soft palate.
During translation, the codons on the mRNA are recognized by complementary base pairing to the anticodon on the
a. ribosome. b. transfer RNA. c. small cytoplasmic RNA. d. aminoacyl tRNA synthetase.
Arboviruses cause ________ and are transmitted by ________
A) meningitis; bee stings B) meningitis; mosquitoes C) encephalitis; dog bites D) encephalitis; mosquitoes E) both meningitis and encephalitis; mosquitoes
Which of the following statements is true?
(a) Phospholipids will spontaneously form liposomes in nonpolar solvents. (b) In eukaryotes, all membrane-enclosed organelles are surrounded by one lipid bilayer. (c) Membrane lipids diffuse within the plane of the membrane. (d) Membrane lipids frequently flip-flop between one monolayer and the other.