Interactions of Limiting Factors (OCR GCSE Biology A (Gateway Science Suite)): Flashcards

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Interactions of Limiting Factors
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Definition of a limiting factor in photosynthesis

An environmental condition that restricts photosynthesis rate when in short supply

Three examples of limiting factors in photosynthesis

Light intensity, carbon dioxide concentration, temperature

What happens to graph line when another factor becomes limiting?

Line levels off/flattens

Effect of increasing light intensity when it's the limiting factor

Rate increases until another factor becomes limiting

How farmers optimize greenhouse conditions for photosynthesis

Increase light intensity, CO₂ levels, maintain optimal temp

Benefits of optimizing photosynthesis in greenhouses

Faster plant growth, higher yields, increased profits

Light intensity is proportional to what (inverse square law)?

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

What happens to light intensity when distance doubles?

Falls to a quarter of its original value

Inverse square law formula for light intensity

Light Intensity∝1Distance2\text{Light Intensity} \propto \frac{1}{\text{Distance}^2}

Light intensity at 2m from lamp compared to original

14\frac{1}{4} of original (122=14\frac{1}{2^2} = \frac{1}{4})

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