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 5 of 5

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

1Plant biologyMust pollination always be carried out by insects?

A. No; wind and other agents can be involved.B. Only if a flower is yellow.C. Yes, all plants use bees.

2Plant biologyWhat is the role of light in photosynthesis?

A. It is a mineral nutrient.B. It supplies all carbon atoms.C. It provides energy.

3Cells & microscopyWhich structure does a typical bacterial cell have: the cell membrane or the nucleus?

A. the nucleusB. the cell membrane

4Cells & microscopyA printed image is 30 mm long at 50× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

Your answerµm

5Human biology & physiologyA fictional circulation model has 57 beats/min and 68 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.

Your answermL/min

6Human biology & physiologyWhich vessels are associated with exchange with tissues?

A. Only solid bone canals.B. Capillaries.C. Only the largest arteries.

7Genetics & inheritanceIn pea plants, the allele for round seeds (R) is dominant over the allele for wrinkled seeds (r). Two plants, Rr × rr, are crossed. What percentage of the offspring are expected to have the genotype RR?

Your answer%

8Genetics & inheritanceIn the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 140 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

Your answer

9Evolution & biodiversityIn natural selection, what evolves?

A. Individual organisms, during their lifetimeB. Single cells, in one dayC. Populations, over generationsD. Rocks and minerals

10Evolution & biodiversityDoes being drawn farther right on a tree mean a species is more evolved?

A. Yes, always.B. No.C. Only if the line is thicker.

11Ecology & populationsSupplied fictional records give M = 76 initially marked, C = 27 in a later sample, and R = 5 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.

Your answer

12Ecology & populationsA supplied food-web model transfers 22% of 963 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.

Your answerkJ

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 the independent variable?

A. the brightness of the lightB. the height of the plantsC. the volume of water given

14Measurement & evidenceWhich conclusion matches a small controlled study more closely?

A. The result proves every possible mechanism.B. Under these tested conditions, the measured groups differed.C. Every organism everywhere will always respond the same way.

From Grade 9

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

15Plant biology (Grade 9)In supplied data, 26 of 194 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

Your answer%

16Plant biology (Grade 9)In supplied data, 43 of 47 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

Your answer%