In which of the following ways do polytene chromosomes differ from other chromosomes?
A) Polytene chromosomes can only be found in bacteria.
B) Polytene chromosomes are multiple copies of identical single-stranded DNA.
C) Polytene chromosomes are separated but not replicated.
D) Polytene chromosomes are replicated but not separated.
E) Polytene chromosomes represent uncoiled versions of meiotic chromosomes.
Answer: D
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Lipids that form membranes have what kind of structure?
A) completely nonpolar, because they are lipids B) completely polar, which allows them to dissolve in water C) polar heads and nonpolar tails; the nonpolar tails interact with water D) polar heads and nonpolar tails; the polar heads interact with water
An extended period of torpor entered by an animal during the winter when the environment is too cold
and food is too scarce is called
a. estivation. b. hyperthermia. c. thermal acclimatization. d. hypothermia. e. hibernation.
Four of the five answers listed below are sinks for sugar deposition. Select the exception
a. immature fruits b. roots c. leaves d. immature seeds e. shoots
With increasing altitude, air density ________
Fill in the blank(s) with correct word