Interactions of Limiting Factors (AQA GCSE Biology): Flashcards

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Interactions of Limiting Factors
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Limiting factor definition

Environmental condition restricting photosynthesis when scarce

Three examples of limiting factors

Light intensity, CO₂ concentration, temperature

Graph pattern when factor becomes limiting

Line increases initially then levels off

Effect of increasing light intensity when limiting

Raises photosynthesis rate until another factor limits

How farmers use limiting factors knowledge

Optimise greenhouse conditions (light, CO₂, temp)

Benefits of optimising greenhouse conditions

Faster growth, higher yields, increased profits

Law describing light intensity & distance relationship

Inverse square law

Light intensity is inversely proportional to...

Square of distance from light source

Light intensity when distance doubles

Falls to 1/4 (quarter) of original value

Formula: Light intensity \propto ?

1Distance2\frac{1}{\text{Distance}^2}

Light intensity at 2m distance (fraction)

14\frac{1}{4} (calculation: 122\frac{1}{2^2})

Purpose of understanding inverse square law

Manage light conditions for optimal photosynthesis

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