Refer to the Figure

question 36

Multiple Choice

Refer to the figure. The figure shows the results of an experiment where wild type and obligate selfing (i.e. self-fertilizing) C. elegans nematode worms were reared across many generations, with and without their lethal bacterial pathogen, Serratia marcescens. Which of the following is not a reasonable inference from this figure?

• A) C. elegans populations with very limited genetic variation are more vulnerable to pathogens.
• B) Outcrossing may be advantageous only under particular conditions.
• C) After 30 generations, mortality rate from S. marcescens for a treatment "Wild type (no bacteria)" would probably be around 0%.
• D) After 30 generations, mortality rate from S. marcescens for a treatment "Wild type (no bacteria)" would probably be around 100%.

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Definitions:

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