Question detail

GX19: In marram dune quadrat, which design best tests Explain stabilising, directional and disruptive selection.?

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MCQ

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practice

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Topic

Genetics and ecosystems official content

Question

A. GX19: Use the marram dune quadrat. Measure percentage cover grid. Change sand moisture probe; record the dependent variable from the data table; hold shoreline distance marker constant. Use random/systematic sampling, representative sample size and bias check. Compare observed and expected values; use critical value, significance and null hypothesis. Correlation means association; correlation does not prove causation. Keep locus-variant evidence separate from allele-frequency model evidence and selection evidence. Evaluate validity, reliability, limitation, conclusion and improvement.
B. GX19: Use casual observations of marram dune quadrat; omit expected values and ignore sample size. Evaluate validity, reliability, limitation, conclusion and improvement.
C. GX19: Change sand moisture probe and shoreline distance marker together, then claim correlation proves causation. Evaluate validity, reliability, limitation, conclusion and improvement.
D. GX19: Discuss Explain stabilising, directional and disruptive selection. without a null hypothesis, controlled variable or bias check. Evaluate validity, reliability, limitation, conclusion and improvement.

Answer

The correct answer is: GX19: Use the marram dune quadrat. Measure percentage cover grid. Change sand moisture probe; record the dependent variable from the data table; hold shoreline distance marker constant. Use random/systematic sampling, representative sample size and bias check. Compare observed and expected values; use critical value, significance and null hypothesis. Correlation means association; correlation does not prove causation. Keep locus-variant evidence separate from allele-frequency model evidence and selection evidence. Evaluate validity, reliability, limitation, conclusion and improvement.

Explanation

GX19: The correct option is supported by percentage cover grid, sand moisture probe, controlled shoreline distance marker, representative sampling, observed and expected values, and a cautious correlation judgement. Evaluate validity, reliability, limitation, conclusion and improvement.

Common mistake

Evolution may lead to speciation common mistake 1

Giving a vague answer instead of directly addressing: Explain stabilising, directional and disruptive selection..

Answer by clearly explaining how to explain stabilising, directional and disruptive selection..

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