Daily Practice

GCSE Science

30th June 1988

5 questions · GCSE · 584 questions in this band

1
DNA, Genetics and Inheritance
State how many chromosomes are found in a normal human body cell, and how they are arranged.
2
Variation, Evolution and Selection
Explain why genetic engineering can introduce a new characteristic in a single generation, while selective breeding cannot.
3
Ecology
Name the group of organisms that break down dead plant and animal matter, returning mineral ions to the soil.
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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