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6. What must happen during speciation for the gene pools to become different?

  • The environment must change.
  • A mutation must occur.
  • A mutation must be selected for by the environment.
  • Reproductive isolation.

7. Which of these in an effect of using nitrogen-containing fertilisers?

  • eutrophication
  • All 3
  • leaching
  • reduced species diversity

8. Describes how an organism fits into its environment and its role.

  • Population
  • Habitat
  • Ecological niche
  • Community

9. What is the end product of glycolysis?

  • triose phosphate
  • pyruvate
  • phosphorylated glucose
  • acetate

10. Where does the electron transport chain take place?

  • cytoplasm
  • cristae
  • matrix

11. What genetic diseases most often result in males being affected while women can be carriers?

  • Sex linked genes (to the Y chromosome)
  • Dominant genes
  • Sex linked genes (to the X chromosome)
  • Recessive genes

12. What does directional selection do?

  • Change the characteristics of a population
  • Preserve the characteristics of a population

13. How many molecules of ATP are formed in the Krebs cycle?

  • 3
  • 1
  • 2
  • 4

14. Intraspecific competition is...

  • between the same species
  • between different species

15. Where does the link reaction take place?

  • cristae
  • matrix
  • cytoplasm

16. How many ATP molecules are produced at the end of glycolysis?

  • 0
  • 6
  • 2
  • 4

17. What organism helps the process of nitrogen in the atmosphere become ammonia?

  • Saprophytes
  • Nitrogen fixing bacteria
  • Nitrifying bacteria
  • Denitrifying bacteria