Daily Practice - GCSE Science
4th December 1997
- 1DNA, Genetics and Inheritance
Explain one benefit of the Human Genome Project.
- 2Variation, Evolution and Selection
Explain one reason it took many years for Darwin's theory of evolution by natural selection to become widely accepted.
- 3Ecology
A student counts 3, 5, 4 and 8 dandelion plants in four separate 1 m^2 quadrats. Calculate the mean number of dandelions per quadrat.
- 4Ecosystems, 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.
- 5Biodiversity, Cycles and Human Impact
Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.
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