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Grade 10 · Biology

Grade 10 Biology diagnostic

16 questions on plant biology, cells & microscopy, human biology & physiology, genetics & inheritance, evolution & biodiversity, ecology & populations and measurement & evidence, plus 2 from Grade 9. Answer what you can, then check your answers to see which topics are secure and what to practise next.

16 questions7 topicsAbout 20 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 biologyA model shoot loses 8 g of water in 4 hours. Find the average mass-loss rate.
g/hour
2Plant biologyWhich conclusion is justified by 30 of 40 tested seeds germinating?
3Cells & microscopyA printed image is 40 mm long at 100× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.
µm
4Cells & microscopySupplied plant-tissue data show initial mass 3.2 g and final mass 2.7 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.
%
5Human biology & physiologyA fictional circulation model has 68 beats/min and 53 mL/beat. Find its flow in mL/min. These are supplied model values, not diagnostic ranges. Round to 3 decimal places if needed. Answer in mL/min.
mL/min
6Human biology & physiologyWhat is plasma?
7Genetics & inheritanceA DNA template strand reads ACCAATC. Which mRNA sequence is transcribed from it, read base by base in the same order?
8Genetics & inheritanceIn the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 60 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.
9Evolution & biodiversityDuring the Industrial Revolution in England, soot darkened tree bark, and dark peppered moths became more common. Why?
10Evolution & biodiversityWhich data can contribute to classification?
11Ecology & populationsA supplied survey counts 96 plants in 5 non-overlapping quadrats, each 2 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².
plants/m²
12Ecology & populationsSupplied fictional records give M = 73 initially marked, C = 29 in a later sample, and R = 29 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.
13Measurement & evidenceInvestigation: Identical bean plants are grown under lamps of different brightness, each given the same volume of water, and their heights are measured after three weeks. In this investigation, which is a controlled variable?
14Measurement & evidenceDoes correlation between two variables alone establish causation?

From Grade 9

These questions check skills from the grade below, so gaps can be spotted early.

15Plant biology (Grade 9)In supplied data, 22 of 52 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.
%
16Plant biology (Grade 9)In supplied data, 33 of 86 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.
%