Daily Practice

GCSE Science

18th March 1993

5 questions · GCSE · 584 questions in this band

1
DNA, Genetics and Inheritance
Define homozygous.
2
Variation, Evolution and Selection
Define mutation.
3
Ecology
Explain why deforestation to create land for cattle grazing can reduce biodiversity.
4
Ecosystems, Adaptation and Feeding Relationships
In a grassland food chain, the biomass of grass available is 8400 kg and the biomass transferred to the rabbits that eat it is 940 kg. Calculate the percentage efficiency of biomass transfer from grass to rabbits, to 3 significant figures.
5
Biodiversity, Cycles and Human Impact
Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.

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