Biology Unit 4

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

1. What is meant by the term 'decomposers'?

  • A group of organisms that break down dead producers and consumers into simple components, releasing valuable minerals and elements in a form that can be absorbed plants
  • Organisms that obtain their energy by feeding on other organisms rather than using the energy of sunlight directly
  • Tertiary consumers
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2. What does an organic fertiliser consist of?

  • Dead/decaying remains of plants and animal waste, e.g manure and bone meal
  • Minerals mined from rocks and deposits and blended to give the appropriate balance for a particular crop

3. What is the formula to calculate death 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 deaths per year / total population in the same year) x 1000
  • (Births + immigration) - (deaths + emigration)

4. Why is ATP sometimes referred to as the 'immediate energy source' of the cell?

  • The instability of the phosphate bonds means that it is broken down very quickly and easily
  • A lot of it is stored in the cell at any one time
  • The energy released is used up very quickly

5. What is meant by 'energy'?

  • The ability to do work
  • ATP
  • Calories
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