Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
16th June 2017
- 1DNA, Genetics and Inheritance
A man has genotype XY. State his sex, and state which sex chromosomes are found in the sperm cells he produces.
- 2Variation, Evolution and Selection
State what is meant by a selection pressure.
- 3Ecology
Give one example of a biotic factor that could affect a population of rabbits.
- 4Ecosystems, Adaptation and Feeding Relationships
A student places ten 1 m x 1 m quadrats at random across a school field of area 3000 m2 and counts a total of 45 dandelions across all ten quadrats. Estimate the total number of dandelions on the field.
- 5Biodiversity, Cycles and Human Impact
A peat bog covered an area of 850 hectares in 2015. By 2025, drainage for farmland had reduced the peat bog to 680 hectares. Calculate the percentage decrease in the area of the peat bog.
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