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B1 Revision
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- 1B1 RevisionQuestions on Topic 1, Topic 2 and Topic 3 of B1 :)
- 2Q: What are the ranks in the classification system? (List in order)A: Kingdom, Phylum, Class, Order, Family, Genus, Species
- 3Q: Describe the main symptoms of sickle cell disease. (3)A: Weakness/ Fatigue
Shortness of breath
Swelling of hands and feet
Blocked blood vessels - 4Q: Using your knowledge of natural selection, suggest why the dodo may have become extinct. (3)A: • Predation / disease (1)
• change in environmental
conditions (1)
• loss of food source /
reduced food source (1)
• increased competition (1)
•survival of the fittest (1) - 5Q: Describe the causes of variation in a population. (2)A: genetic (variation)
due to mutation
due to sexual reproduction /
interbreeding / hybridisation
environmental (variation) - 6Explain how stimulants affect neurotransmission. (3)• stimulants act at the
synapse
• more neurotransmitters
• so speeds up
neurotransmission
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- Questions from Topic 1, Topic 2 and Topic 3 of B1 :)
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- OmaimaE
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