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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 4 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, 81 of 110 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.
%
2Plant biologyDo plants also carry out cellular respiration?
3Plant biologyA sample has 40 seeds and 30 germinate under the stated test conditions. Find the germination percentage.
%
4Plant biologyIn supplied data, 77 of 101 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 8 mm long at 500× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.
µm
6Cells & microscopyWhich structure makes proteins from amino acids using genetic instructions?
7Cells & microscopyAn object is 20 µm long and its image is 2000 µm long. Find magnification.
8Cells & microscopyA printed image is 20 mm long at 40× 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 20% of 1039 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 & populationsShould a fixed 10% transfer rule be used as an exact value for every ecosystem?
11Ecology & populationsA supplied food-web model transfers 11% of 174 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 & populationsWhich is a primary producer in this simple land food chain?