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6. How many molecules of ATP are formed in the Krebs cycle?
7. Where does the light dependent stage take place?
- chlorophyll
- thylakoids
- mitochondria
- stroma
8. 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.
9. Intraspecific competition is...
- between the same species
- between different species
10. What genetic diseases most often result in males being affected while women can be carriers?
- Sex linked genes (to the X chromosome)
- Sex linked genes (to the Y chromosome)
- Dominant genes
- Recessive genes
11. How many ATP molecules are produced at the end of glycolysis?
12. What organism helps the process of nitrogen in the atmosphere become ammonia?
- Nitrifying bacteria
- Saprophytes
- Nitrogen fixing bacteria
- Denitrifying bacteria
13. Acetyl CoA combines with what molecule to form a 6C molecule?
14. Which of these is a feature of intensive rearing?
- High protein food
- Warm environment
- All of these
- Restricted movement
15. What does directional selection do?
- Change the characteristics of a population
- Preserve the characteristics of a population
16. Which of these in an effect of using nitrogen-containing fertilisers?
- eutrophication
- All 3
- leaching
- reduced species diversity
17. Where does the link reaction take place?