Bio geographers have noted that the tropics have more terrestrial species than temperate regions. Which of the following is NOT a plausible explanation for this pattern?

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#Question id: 1072

#XL - T Zoology

After growth in tissue culture, the infected cells lyse and the virus may be harvested from

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#Question id: 1073

#XL - T Zoology

Prions

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#Question id: 1077

#XL - T Zoology

Would ID50 and LD50 necessarily be the same for a given virus? Why or why not?

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#Question id: 1078

#XL - T Zoology

Which of the following statements about interferon is incorrect?

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#Question id: 1080

#XL - Q Biochemistry

 In the formation of biofilms, such as those forming on unbrushed teeth, cell signaling serves which function?

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#Question id: 1081

#XL - Q Biochemistry

Which of the following is a type of local signaling in which a cell secretes a signal molecule that affects neighboring cells?