In laboratory experiments, two species of the protist Paramecium were grown alone and in the presence of another species. The following graphs show growth of species 1 (left) and species 2 (right), both along and when in mixed culture.

Interpretation of these graphs shows that

both species are not affected by interspecific competition

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both species are affected by interspecific competition but species 1 is less affected

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both species are affected by interspecific competition but species 2 is less affected

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both species are affected equally by interspecific competition

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Solution

The correct option is C both species are affected by interspecific competition but species 2 is less affected
In presence of other species, number of individuals in both species decreases. Hence, both species are affected by interspecific competition. But, as seen in the graphs, decrease is less in species 2.

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In laboratory experiments, two species of the protist Paramecium were grown alone and in the presence of another species. The following graphs show growth of species 1 (left) and species 2 (right), both along and when in mixed culture. Interpretation of these graphs shows that

In laboratory experiments, two species of the protist Paramecium were grown alone and in the presence of another species. The following graphs show growth of species 1 (left) and species 2 (right), both along and when in mixed culture.

Interpretation of these graphs shows that