________ allow(s) the influenza virus to recognize and attach to body cells before infecting them.
a) NA spikes
b) HA spikes
c) The lipid bilayer
d) The protein coat
Ans: b) HA spikes
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What is the main difference between binary fission and mitosis?
A.) There is no DNA replication in binary fission. B.) Two parents are required for mitotic reproduction C.) Binary Fission occurs in single-celled organisms only. D.) Mitosis takes place only in sexual reproduction.
In the reaction glucose + fructose ----> sucrose + water, _______ is a reactant and _______ is a product.
A. sucrose ... fructose B. glucose ... water C. glucose ...fructose D. sucrose ... water
Consider the modified pay-off structure for the hawk-dove game below. What strategy should the players adopt? (v = benefit of the resource that is being fought over.)
a. Both players should either always play dove or always play hawk. b. Both players should always play hawk. c. One player should always play hawk; the other should always play dove. d. Each player should play hawk a fraction of the time.
The apprentice in your horticulture lab accidentally trims all of the axillary buds from a particularly prized specimen. After realizing his mistake, he rather glumly asks you, as lead horticulturalist, about the effects on the plant. You predict that
A. the plant will die rapidly from this loss. B. the plant will regrow the lost buds. C. the plant will continue its vertical growth and will be a tall and skinny variety. D. the plant will continue its horizontal spread and will be a wide but short variety.