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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 2 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, 75 of 142 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 biologyWhich event is pollination?
4Plant biologyIn supplied data, 36 of 158 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 77 mm long at 50× 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 & microscopyWhy must image size and actual size use matching units in a magnification ratio?
8Cells & microscopyA printed image is 39 mm long at 400× 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 17% of 393 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 & populationsWhy is a food web often more realistic than one chain?
11Ecology & populationsA supplied food-web model transfers 8% of 480 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 & populationsA stated model transfers 20% of 500 energy units to the next level. How many units are transferred?