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Grade 7 · Biology

Grade 7 Biology diagnostic

12 questions on plant biology, cells & microscopy and ecology & populations. Answer what you can, then check your answers to see which topics are secure and what to practise next.

12 questions3 topicsAbout 15 minutesSet 1 of 5

Skip a question if you do not know the answer. It is better than guessing, because it shows what to practise.

1Plant biologyIn supplied data, 91 of 94 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.
%
2Plant biologyWhat should be included when reporting a photosynthesis investigation?
3Plant biologyWhat does dispersal describe?
4Plant biologyIn supplied data, 1 of 38 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.
%
5Cells & microscopyA printed image is 48 mm long at 500× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.
µm
6Cells & microscopyWhy must image size and actual size use matching units in a magnification ratio?
7Cells & microscopyWhich structure forms a selective boundary around a cell?
8Cells & microscopyA printed image is 59 mm long at 50× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.
µm
9Ecology & populationsA supplied food-web model transfers 6% of 1086 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.
kJ
10Ecology & populationsWhat is a decomposer's role in a simple nutrient model?
11Ecology & populationsA supplied food-web model transfers 16% of 1368 kJ to the next level. Find transferred energy. The stated efficiency is not a universal ecological constant. Round to 3 decimal places if needed. Answer in kJ.
kJ
12Ecology & populationsShould a fixed 10% transfer rule be used as an exact value for every ecosystem?