Ecology Evolution and Practical Experimental Skills Practice Questions | A-Level Biology

Ecology Evolution and Practical Experimental Skills

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In a woodland survey, 25 quadrats (each \(0.50\,m \times 0.50\,m\)) are placed using random coordinates. A plant species is recorded as present in 9 quadrats. Which statement best justifies using frequency (presence or absence) rather than percentage cover for estimating distribution of this species?

Select one option.

Frequency automatically converts to biomass without any additional measurements.
Percentage cover is invalid unless all leaves are horizontally oriented.
The species occurs as discrete individuals that are widely spaced, so presence or absence is clear and repeatable.
Frequency corrects for differences in quadrat area even when quadrats are unequal.
Percentage cover is only used for animals, not for plants.

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