Q1.1. The graphs below show the results of an experiment in which a species of d

Question

Q1.1. The graphs below show the results of an experiment in which a species of diatom was cultured in a chemostat for 50 hours, at which point the nutrient input rates were all doubled. Which of the choices below can be inferred from these results? Population Sizes Over Time 50 Organisms Green Algae Cyanobacteria_ Diatom 30 20 10 25 50 75 100 Time (hours) Nutrient Levels Over Time 2.0 1.6 1.2 0.80 0.40 Nutrient ug/100 ml 5750 102 182 Nitrogen 25 50 75 100 Time (hours) Diatom growth is unaffected by nutrients Diatom growth is most strongly affected by nitrogen availability Diatom growth is most strongly affected by phosphorus availability Diatom growth is most strongly affected by silicon availability

Explanation / Answer

Which of the choices below can be inferred from these results?

D) Diatom growth is most strongly affected by silicon availability.

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