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B7: Quiz 3
B7: Quiz 3
1) The population and distribution of organisms in an ecosystem is affected by biotic and abiotic factors.
a)
i) What are biotic factors?
ii) Give 3 biotic factors.
b)
i) What are abiotic factors?
ii) Give 4 abiotic factors.
2) Some small plants live underneath a tree. The tree grows, which results in the tree’s leaves blocking out light for the small plants underneath the tree. Explain what effect this will have on the growth and population of the plants underneath the tree.
3) What are the two abiotic factors that relate to the soil?
4) Give an abiotic factor that affects the population of aquatic animals. Explain why this abiotic factor is important.
5) Red squirrels were the native squirrel in the UK. The grey squirrel was introduced to the UK from America. The introduction of grey squirrels resulted in the population of red squirrels declining. Explain why the population of red squirrels declined.
a)
i) What are biotic factors?
ii) Give 3 biotic factors.
b)
i) What are abiotic factors?
ii) Give 4 abiotic factors.
2) Some small plants live underneath a tree. The tree grows, which results in the tree’s leaves blocking out light for the small plants underneath the tree. Explain what effect this will have on the growth and population of the plants underneath the tree.
3) What are the two abiotic factors that relate to the soil?
4) Give an abiotic factor that affects the population of aquatic animals. Explain why this abiotic factor is important.
5) Red squirrels were the native squirrel in the UK. The grey squirrel was introduced to the UK from America. The introduction of grey squirrels resulted in the population of red squirrels declining. Explain why the population of red squirrels declined.