What would be an expected feature of a plasma membrane that had no integral membrane proteins?
A. the membrane would have no fluidity
B. the membrane would not associate with peripheral membrane proteins
C. the membrane would have no cholesterol
D. the membrane would be unable to transport sodium ions
E. the membrane would collapse
Answer: D
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Based on the principle of species individuality, how would you predict that climate change would affect the geographical range of species within a community?
A. Each species would shift its range in a unique manner, according to its physiological needs. B. All species in the community would migrate together as a "superorganism", because all species are connected. C. Assemblages of species would migrate together in predictable groups. D. Only the competitively dominant species would shift their ranges; less competitive species cannot adapt to climate changes.
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What will be an ideal response?
What accounts for the fact that polydactylism is prevalent and Tay-Sachs disease virtually absent in
one human population in the United States, while Tay-Sachs disease is prevalent and polydactylism virtually absent in another? a. Natural selection has promoted these differences since humans live in many different environments. b. Mutation rates differ between different loci. c. There is little gene flow between the two populations. d. The populations are small, and therefore genetic drift is a major factor in the determination of allele frequencies. e. Genetics is an unpredictable science.
Viruses with -ssRNA require the activity of (DNA polymerase/reverse transcriptase/RNA-dependent RNA polymerase) for their replication
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