Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
6th April 2021
- 1Red-shift and the Expanding Universe
Name the model of the origin of the universe that is supported by red-shift observations.
- 2Biology Required Practicals and Data Analysis
In the microbiology practical, why are agar plates incubated at 25 degrees Celsius in schools rather than at 37 degrees Celsius?
- 3Cell Biology
A student views a red blood cell at a magnification of x2000. The image of the cell measures 20 mm across. Calculate the real width of the cell, giving your answer in micrometres (um).
- 4Cell Structure and Microscopy
Why is a stain such as iodine used when preparing a slide?
- 5Cell Division and Stem Cells
What happens to the DNA before mitosis begins?
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