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Why is random sampling used when placing quadrats?
A
To show whether the pattern occurs across the habitat rather than being specific to one line.
B
The marked animals were diluted by a large population, so the estimate is high.
C
The estimated population is calculated using population=density×total area\boxed{\textbf{population}=\textbf{density}\times\textbf{total area}}population=density×total area.
D
It gives every position an equal chance of selection, reducing bias.
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6.1.1 Field investigation of distribution and abundance Flashcards
20 flashcards on OCR GCSE Biology 6.1.1 Field investigation of distribution and abundance: the key terms, definitions and processes you need to recall for the written papers.