Biology Unit 4

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  • Created by: Sacha
  • Created on: 10-06-13 18:54

1. Name three adaptations of the leaf for photosynthesis?

  • Large surface area that collects as much sunlight as possible / arrangement of leaves that minimises overlapping, so no leaf shadows another / thin, so the diffusion distance is short
  • Waxy cuticle / stomata / hairs
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2. What is the formula to calculate birth rate?

  • (total number of individuals in the first sample) x (total number of individuals in the second sample) / number of marked individuals recaptured
  • (number of births per year / total population in the same year) x 1000
  • (Births + immigration) - (deaths + emigration)

3. What is the formula for calculating percentage population growth?

  • (Births + immigration) - (deaths + emigration)
  • (Population change during period / population at the start of the period) x 100
  • (total number of individuals in the first sample) x (total number of individuals in the second sample) / number of marked individuals recaptured

4. What are the two types of quadrat?

  • Pinpoint and square quadrats
  • Point and frame quadrats
  • Line and frame quadrats

5. What is the formula used to calculate net production (rate at which plants store energy)?

  • respiratory losses - gross production
  • gross production - respiratory losses
  • net production - gross production

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