Who this is for: Cambridge IGCSE Biology (0610) students who want features of organisms — the five kingdoms and their cell features — to become a reliable source of marks instead of lists they only half-remember.
What query it owns: how to understand and revise features of organisms in Cambridge IGCSE Biology.
Why this is safe: this page owns the features-of-organisms revision-guide angle, while Tutopiya’s Features of Organisms subtopic page owns the learning resource and the free features of organisms quiz owns the practice.

Every living organism is made of cells — the basic structural unit of life. Cambridge IGCSE Biology (0610) divides organisms into five kingdoms based on shared cell features, nutrition and whether they are unicellular or multicellular. This guide explains what distinguishes each kingdom, the features common to all cells, and how examiners test comparisons between groups.

Key takeaways

• All cells have a cell membrane, cytoplasm and genetic material (usually DNA).
• The five kingdoms are Animalia, Plantae, Fungi, Protista and Prokaryota (introduced by R. H. Whittaker).
• Animal cells: multicellular, nucleus, no cell wall or chloroplasts; feed on organic substances from other organisms.
• Plant cells: multicellular, nucleus, cellulose cell wall and chloroplasts; feed by photosynthesis.
• Fungal cells: usually multicellular, nucleus, chitin cell wall (not cellulose); saprophytic or parasitic nutrition.
• Prokaryote cells: often unicellular, no nucleus — DNA is naked in the cytoplasm.

What are features of organisms in Cambridge IGCSE Biology?

Features of organisms describes the distinguishing characteristics of the five kingdoms — especially their cell structure, how they obtain nutrition, and whether they are unicellular or multicellular. Before studying the kingdoms, remember that every cell has a cell membrane (separating contents from the environment), cytoplasm (jelly-like fluid inside) and genetic material.

You can read the full explanation, diagrams and notes on Tutopiya’s Features of Organisms subtopic page before you attempt questions.

The five kingdoms at a glance

Kingdom	Unicellular / multicellular	Nucleus	Cell wall	Chloroplasts	Nutrition
Animalia	Multicellular	Yes	No	No	Heterotrophic (feed on others)
Plantae	Multicellular	Yes	Cellulose	Yes	Autotrophic (photosynthesis)
Fungi	Usually multicellular	Yes	Chitin	No	Saprophytic / parasitic
Protista	Mostly unicellular	Yes	Sometimes	Sometimes	Mixed
Prokaryota	Often unicellular	No	Sometimes	No	Varied

Kingdom-by-kingdom: what examiners expect

Kingdom Animalia

Animals are multicellular. Their cells contain a nucleus but no cell wall and no chloroplasts. They cannot photosynthesise and must feed on organic substances made by other living things (heterotrophic nutrition).

Kingdom Plantae

Plants are multicellular. Their cells have a nucleus, a cellulose cell wall and chloroplasts for photosynthesis. They produce their own food (autotrophic nutrition).

Kingdom Fungi

Fungi are usually multicellular (e.g. bread mould); baker’s yeast is unicellular. Cells have a nucleus and a cell wall made of chitin (not cellulose). No chloroplasts — they feed saprophytically on dead/decaying material or parasitically on living hosts.

Kingdom Protista (Protoctista)

Most protists are unicellular; some are multicellular. All have a nucleus. Some resemble plant cells (chloroplasts, cell wall); others resemble animal cells. Nutrition varies — some photosynthesise, others feed on organic substances from other organisms.

Kingdom Prokaryota (Monera)

Prokaryotes are often unicellular (e.g. bacteria). They have no nucleus — genetic material (DNA) is found naked in the cytoplasm. They may have a cell wall but never membrane-bound organelles such as mitochondria.

Features of organisms in past-paper wording

Command word / phrase	What the question wants	Typical stem
State	List distinguishing features	”State two features of organisms in the plant kingdom.”
Compare	Similarities and differences	”Compare a plant cell with a fungal cell.”
Name the kingdom	Identify from features given	”An organism has chitin cell walls and no chloroplasts. Name its kingdom.”
Complete the table	Fill in cell features	Table with nucleus, cell wall, chloroplast columns

Worked exam-style stems

1. “State three features of organisms belonging to Kingdom Animalia.” Multicellular; cells have a nucleus but no cell wall or chloroplasts; feed on organic substances made by other organisms. Reward: all three distinct features stated clearly.
2. “A student says fungi are plants because they have cell walls. Explain why this is incorrect.” Fungal cell walls are made of chitin, not cellulose; fungi have no chloroplasts and do not photosynthesise. Reward: chitin vs cellulose and nutrition difference.
3. “State one feature of prokaryote cells that distinguishes them from all other kingdoms.” No nucleus / genetic material is not enclosed in a nucleus. Reward: precise reference to absence of nucleus.

Test yourself with the features of organisms quiz once you can compare kingdoms without notes.

How features of organisms connects to the syllabus

This topic builds on Concept and Use of a Classification System and feeds into Cell Structure and Organisation, where you study organelles in detail. Use the Cambridge IGCSE Biology resource hub to move between subtopics efficiently.

Common mistakes students make

• Saying all organisms with cell walls are plants (fungi and some bacteria also have cell walls).
• Forgetting that protists vary — not all have chloroplasts.
• Confusing chitin (fungi) with cellulose (plants).
• Stating animals are unicellular (they are multicellular).
• Missing that prokaryotes lack a nucleus — the single most important distinguishing feature.

When you need more support

If kingdom comparisons keep tripping you up, work through the Characteristics and Classification topical past paper questions and the features of organisms quiz, then get help from a Cambridge IGCSE Biology tutor.

Frequently asked questions

Do I need to memorise all five kingdoms? Yes — know the name, cell features and nutrition type for each. Comparison tables are the fastest way to revise.

What is the difference between Protista and Prokaryota? Protists are eukaryotes (have a nucleus); prokaryotes (bacteria) have no nucleus.

Are fungi plants? No. Fungi have chitin cell walls, no chloroplasts, and do not photosynthesise.

How do I revise features of organisms effectively? Build a comparison table, cover one column and recall from memory, then take the features of organisms quiz.

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