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 2 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 5.6 g and final mass 5.4 g. Find signed percentage mass change. No experiment is required. Round to 3 decimal places if needed. Answer in %.

Your answer%

2Cells & microscopyA printed image is 56 mm long at 100× magnification. Find the actual length in micrometers. Round to 3 decimal places if needed. Answer in µm.

Your answerµm

3Human biology & physiologyA fictional circulation model has 58 beats/min and 72 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 & physiologyWhich feature is associated with adaptive immunity?

A. Only external bones.B. No interaction with antigens.C. Specific recognition and memory.

5Genetics & inheritanceIn the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 116 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

Your answer

6Genetics & inheritanceA stated model has red RR, white WW and pink RW flowers. What pattern is described?

A. Complete dominance of red.B. Incomplete dominance.C. No inheritance.

7Evolution & biodiversityWhich evolves in the population-genetic sense over generations?

A. A population's inherited composition.B. A rock learning to move.C. A single individual because it wishes to adapt.

8Evolution & biodiversityWhat are homologous structures?

A. Structures found only in fossilsB. Structures in different species that share an underlying pattern because of common ancestry, such as the bones of a human arm and a bat wingC. Structures that no longer have any functionD. Structures that look the same but evolved separately

9Ecology & populationsA supplied survey counts 127 plants in 4 non-overlapping quadrats, each 0.25 m². Find the mean density in the sampled area. Round to 3 decimal places if needed. Answer in plants/m².

Your answerplants/m²

10Ecology & populationsA fictional population starts at 294. During one interval: 52 births, 40 arrivals, 26 deaths and 3 departures. Find the final count. Round to 3 decimal places if needed.

Your answer

11Measurement & 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?

A. the height of the plantsB. the brightness of the lightC. the volume of water given

12Measurement & evidenceWhich is the measured dependent variable in a stated light-versus-plant-height study?

A. Only the lamp label.B. The investigator's favorite color.C. Plant height after the stated interval.

From Grade 10

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

13Plant biology (Grade 10)Which conclusion is justified by 30 of 40 tested seeds germinating?

A. Exactly 75% of all future seeds everywhere will germinate.B. 75% germinated in this tested sample and conditions.C. The other seeds are certainly all dead.

14Human biology & physiology (Grade 10)Which process describes chemical breakdown of a large food molecule?

A. Only circulation.B. Only absorption.C. Digestion.

15Cells & microscopy (Grade 10)Convert 0.4 mm to micrometers.

Your answerµm