study guide · 16 units

Biology

Pick a unit, work through the activities, then test yourself. The bars show how often each unit turns up in past papers, so you know where your time pays off.

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Cell division: Mitosis

5 goals, about 28 minutes.

Start Mitosis

Living organisms in the environment

Living things: diversity and classification

Grouping living things by what they look like, and naming the main groups.

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Often asked

Living organisms in the environment

Ecosystems, food chains and energy

Food chains and webs, how energy flows, and how soil, water and climate shape a habitat.

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Living organisms in the environment

People and the environment

Recycling in nature and by people, pollution, climate change and protecting the environment.

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Life processes and disease

Cells

Plant and animal cells, what each part does, and how diffusion and osmosis move substances.

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Often asked

Life processes and disease

Nutrition

Photosynthesis, food tests, digestion and enzymes, and a balanced diet.

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Life processes and disease

Respiration and gas exchange

Releasing energy from food, breathing and gas exchange, and the effects of smoking.

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Often asked

Life processes and disease

Transport, storage and defence

The heart, blood and immunity, and how plants move water and food.

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Life processes and disease

Excretion and keeping a steady state

Removing wastes from plants and animals, and how the kidney keeps water in balance.

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Life processes and disease

Movement

The human skeleton, how the arm moves, and why animals move about.

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Often asked

Life processes and disease

Sensing and responding

Stimulus and response, nerves and reflexes, the brain, the eye and the skin.

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Life processes and disease

Growth

Measuring growth, and what happens inside a seed as it germinates.

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Life processes and disease

Reproduction

Human reproduction and birth control, flowers, pollination, fruits and seeds.

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Life processes and disease

Disease and its control

Kinds of disease, the mosquito’s life cycle, and how diseases are treated and controlled.

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Often asked

Continuity and variation

Cell division, genes and inheritance

Mitosis and meiosis, DNA, genes and alleles, and genetic crosses.

0 of 1 done · 28 min

Continuity and variation

Variation, species and evolution

How variation arises, what makes a species, and natural selection.

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Continuity and variation

Genetic engineering and society

Changing an organism’s traits by genetic engineering, and weighing up the gains and the risks.

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0 of 1 topic done across the guide. Paper 1 bars show how many of a paper’s 60 questions each unit gets on average, across 25 past Paper 1s; the longest bar is the unit asked most. Paper 2 bars are samples until Paper 2 papers are in the Exam Bank. Unit names and order follow the CSEC Biology syllabus.