StudyBrixFree worksheets, study guides and courses

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 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 biologyA simplified equation uses 6 CO₂ to represent formation of one glucose molecule. How many carbon atoms are supplied?
2Plant biologyCan the direction of phloem transport be described as always downward in every plant?
3Cells & microscopyA printed image is 79 mm long at 400× 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 5.1 g and final mass 7.7 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 75 beats/min and 85 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 & physiologyWhich is part of many chemical synapses?
7Genetics & inheritanceIn the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 384 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.
8Genetics & inheritanceIn a canonical double-stranded DNA sample, adenine is 33% of all bases. Find the guanine percentage, assuming A = T and C = G. Round to 3 decimal places if needed. Answer in %.
%
9Evolution & biodiversityWhich condition is NOT needed for natural selection to act on a trait?
10Evolution & biodiversityA survey lists 4 plant species, 3 insect species and 2 bird species, with no duplicates. How many species are listed?
11Ecology & populationsSupplied fictional records give M = 86 initially marked, C = 83 in a later sample, and R = 21 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.
12Ecology & populationsA fictional population starts at 146. During one interval: 35 births, 38 arrivals, 34 deaths and 28 departures. Find the final count. Round to 3 decimal places if needed.
13Measurement & evidenceWhich conclusion matches a small controlled study more closely?
14Measurement & 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 the independent variable?

From Grade 9

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

15Plant biology (Grade 9)In supplied data, 43 of 64 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, 88 of 91 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.
%