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Combined Science: Biology

GCSE · Edexcel · foundation

QuestionsFlashcards

Disease
Defence Against Disease
Development of Medicines
- Antibiotics
  4
- Discovery & Development of New Drugs
  3
Non-Communicable Diseases
- Lifestyle & Non-Communicable Disease
  7
- Cardiovascular Disease
  6

The Organism in the Environment
Human Influences on the Environment
- Human Impact on Biodiversity
  6
- Benefits of Maintaining Biodiversity
  4
Cycles within Ecosystems

Factors Affecting the Rate of Water Uptake Flashcards

All 5 cards in this deck

How does increasing light intensity affect the rate of transpiration?: It increases it, because the stomata open wider in the light so more water vapour escapes.
How does air movement (wind) affect the rate of transpiration?: It increases it, because moving air removes water vapour from around the leaf.
How does increasing temperature affect the rate of water uptake by a plant?: It increases it, because water evaporates from the leaves faster.
In a fan investigation, why is water uptake also measured with the fan switched off?: To act as a control / baseline measurement to compare the effect of air movement.
What is the equation for estimating the rate of water uptake with a potometer?: Rate = distance the air bubble moves ÷ time taken, e.g. in mm/min.