If the experimental population of E. coli lacks an F factor or F plasmid, and if bacteriophage are excluded from the bacterial cultures, then which of these is a means by which beneficial mutations might be transmitted horizontally to other E. coli cells?

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#Question id: 19278

#Unit 9. Diversity of Life Forms

which of these statements is true of the pine life cycle? 

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#Question id: 23380

#General Aptitude

Three words are given in this question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriates choose the most appropriate descriptive about these three words.

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#Question id: 5215

#Unit 11. Evolution and Behavior

What is it about short tandem repeat DNA that makes it useful for DNA fingerprinting?

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#Question id: 12138

#Unit 10. Ecological Principles

The oak tree pathogen Phytophthora ramorum has migrated 650 km in ten years. West Nile virus spread from New York State to 46 others states in five years. The difference in the rate of spread is probably related to

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#Question id: 5532

#Unit 5. Developmental Biology

When does a human egg cell accomplish its meiotic division?