IB problems

495 problems for IB practice, each with a worked solution. Try each one on paper first, then check your answer.

All SubjectsPhysicsChemistryMathematicsBiologyPython ProgrammingStatistics & Data Science

All LevelsHigh School (9–10)High School (11–12)General

All TopicsCell BiologyTissues and OrgansLife ProcessesHeredity and EvolutionPlant BiologyHuman BodyDiversity of Living Organisms

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↺ Reset filtersSortMixedNewest firstOldest firstA to Z18 problems

Type:AnyConceptualNumerical

1.

In a dark room, Rahul cuts the tip off an oat shoot. New

High School (9–10), General · Plant Hormones and Movements, Hormones and the Endocrine SystemBoard Exam, A-Level, IBStemPy Lab

Hard

2.

A fish has a heart with two chambers, and its blood passes through the heart only once in each… New

High School (9–10), General · Transport in Living Organisms, Circulatory SystemBoard Exam, A-Level, IBStemPy Lab

Hard

3.

Aphids are small insects that feed on plants. New

High School (9–10), General · Transport in Living OrganismsBoard Exam, A-Level, IBStemPy Lab

Hard

4.

A bacterium and a white blood cell of a human are both single cells.

High School (11–12) · Kingdom MoneraBoard Exam, AP, A-Level, IBStemPy Lab

Medium

5.

These seven ranks are mixed up: Order, Species, Phylum, Family, Kingdom, Genus, Class.

High School (11–12) · Taxonomic Hierarchy and Aids, Classification of Living OrganismsBoard Exam, A-Level, IBStemPy Lab

Easy

6.

Three birds have these ranks. House sparrow: Animalia, Chordata, Aves, Passeriformes, Passeridae…

High School (11–12) · Taxonomic Hierarchy and Aids, Classification of Living OrganismsBoard Exam, A-Level, IBStemPy Lab

Medium

7.

The house cat is Felis catus, the jungle cat is Felis chaus, and the leopard is Panthera pardus.

High School (11–12) · Taxonomic Hierarchy and Aids, Classification of Living OrganismsBoard Exam, A-Level, IBStemPy Lab

Medium

8.

A plains zebra ( Equus quagga ) and a donkey ( Equus asinus ) can mate in a zoo, and their young, a…

High School (11–12) · Taxonomic Hierarchy and Aids, Classification of Living OrganismsBoard Exam, A-Level, IBStemPy Lab

Medium

9.

Use this key to four pond animals. If the animal has a hard shell, it is a snail.

High School (11–12) · Taxonomic Hierarchy and AidsBoard Exam, IBStemPy Lab

Medium

10.

A starfish is not a fish, a cuttlefish is not a fish, and the insects called white ants are…

High School (11–12) · Biodiversity and NomenclatureBoard Exam, A-Level, IBStemPy Lab

Medium

11.

Give three reasons why biologists need a system for naming and grouping organisms.

High School (11–12) · Biodiversity and NomenclatureBoard Exam, A-Level, IBStemPy Lab

Easy

12.

Each of these is written wrongly. Say what is wrong, and write it correctly: (a) azadirachta…

High School (11–12) · Biodiversity and NomenclatureBoard Exam, A-Level, IBStemPy Lab

Medium

13.

A cylinder of potato has a mass of 6.0 g.

High School (9–10), General · Transport Across the Cell MembraneBoard Exam, AP, A-Level, IBStemPy Lab

Medium

14.

A plant cell and a red blood cell are both placed in pure water.

High School (9–10), General · Transport Across the Cell MembraneBoard Exam, AP, A-Level, IBStemPy Lab

Medium

15.

The graph shows what happened to potato cylinders in salt solutions of different strength.

High School (9–10), General · Transport Across the Cell MembraneBoard Exam, AP, A-Level, IBStemPy Lab

Medium

16.

In a photograph taken with a microscope, a cell is 33 mm wide.

High School (9–10), General · Cell Structure and OrganellesA-Level, IBStemPy Lab

Medium

17.

Two cells are shaped like cubes. Cell X has a side of 3 µm and cell Y a side of 9 µm.

High School (9–10), General · Cell Structure and OrganellesAP, A-Level, IBStemPy Lab

Medium

18.

A cube shaped cell has a side of 2 µm. It grows until its side is 6 µm.

High School (9–10), General · Cell Structure and OrganellesAP, A-Level, IBStemPy Lab

Medium