Choose the correct statement During abortive Transcription 

a. Abortive synthesis takes before escaping the promoter (-10 to +2), entering the elongation phase 

b. Abortive synthesis produces and releases short RNA transcripts of 10 nucleotides 

c. The major phenomenon which is responsible is Brownian ratchet 

d. Three general models were associated is “Scrunching”

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#Question id: 12244

#Unit 10. Ecological Principles

 The amount of genotypic variation in a natural population can be increased by all of the following EXCEPT 

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#Question id: 12243

#Unit 10. Ecological Principles

All of the following are strategies used by potential prey to avoid predation EXCEPT 

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#Question id: 12242

#Unit 10. Ecological Principles

Small body size often allows animals to exploit desert habitats because it

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#Question id: 12241

#Unit 10. Ecological Principles

The process of speciation can be prevented by

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#Question id: 12240

#Unit 10. Ecological Principles

Two plant species co-occur in a prairie. Species X always occurs near species Y. However, species    often occurs in isolation from species X and produces more seeds when alone than when growing next to species X. Which of the following interactions between species X and Y could generate this pattern?

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#Question id: 12239

#Unit 10. Ecological Principles

The figures above show the results of an experiment in which two microbial species, A and B, were grown in three treatments. In treatment I, species A was grown alone. In treatment II, species B was grown alone. In treatment III, both species were grown together at the same starting densities as in (I) and (II). The results suggest the interaction is best described as