Grade 11 Biology diagnostic

15 questions on cells & microscopy, human biology & physiology, genetics & inheritance, evolution & biodiversity, ecology & populations and measurement & evidence, plus 3 from Grade 10. Answer what you can, then check your answers to see which topics are secure and what to practise next.

15 questions6 topicsAbout 15 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.

1Cells & microscopySupplied plant-tissue data show initial mass 13 g and final mass 15.2 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

Your answer%

2Cells & microscopyA cell is modeled as a cube of side 20 µm. Find surface area divided by volume. This geometry is a simplified model. Round to 3 decimal places if needed. Answer in µm⁻¹.

Your answerµm⁻¹

3Human biology & physiologyA fictional circulation model has 64 beats/min and 57 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

4Human biology & physiologyA supplied simplified model has 60 beats/min and 70 mL/beat. Find flow in mL/min.

Your answermL/min

5Genetics & inheritanceIn the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 500 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

Your answer

6Genetics & inheritanceWhat separates in meiosis I in the standard model?

A. Only cell-wall layers.B. All sister chromatids in the same way as meiosis II.C. Homologous chromosomes.

7Evolution & biodiversityWhich describes an adaptation?

A. Any change caused by an injuryB. An inherited trait that improves survival or reproduction in a particular environmentC. A trait that is never passed onD. A skill an animal learns during its life

8Evolution & biodiversityWhat is required for natural selection to change inherited trait frequencies?

A. No offspring differences.B. Every individual deciding to change.C. Heritable variation linked to differences in reproductive success.

9Ecology & populationsA supplied food-web model transfers 6% of 1290 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

10Ecology & populationsA fictional population starts at 247. During one interval: 58 births, 10 arrivals, 59 deaths and 11 departures. Find the final count. Round to 3 decimal places if needed.

Your answer

11Measurement & evidenceInvestigation: Radish seeds are placed on paper towels soaked in water with different salt concentrations, 20 seeds per dish, and the percentage that germinate is recorded. In this investigation, which is the dependent variable?

A. the salt concentrationB. the number of seeds per dishC. the percentage of seeds that germinate

12Measurement & evidenceIndependent measured heights are 8, 10 and 12 cm. Find the mean.

Your answercm

From Grade 10

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

13Plant biology (Grade 10)A sample has 40 seeds and 30 germinate under the stated test conditions. Find the germination percentage.

Your answer%

14Human biology & physiology (Grade 10)Which activity happens at the cellular scale?

A. Only chest movement.B. Chemical reactions coupling fuel breakdown to ATP production.C. Only air entering the nose.

15Cells & microscopy (Grade 10)A 50 µm scale bar is 2 cm long on a print. An object is 6 cm long on the same print. Find its actual length.

Your answerµm