1.3

Features of organisms

Cambridge IGCSE Biology (0610)  · Unit 1: Characteristics and classification of living organisms  · 10 flashcards

Features of organisms is topic 1.3 in the Cambridge IGCSE Biology (0610) syllabus , positioned in Unit 1 — Characteristics and classification of living organisms , alongside Characteristics of living organisms and Concept and uses of classification systems.

This topic is examined in Paper 1 (multiple-choice) and Papers 3/4 (theory), plus Paper 5 or Paper 6 (practical / alternative to practical). Past papers from 2022 to 2025 record 4 explicit questions on this topic — though the concept underpins many adjacent topics, so it is tested far more often than that figure suggests.

The deck below contains 10 flashcards — 10 identification cards — covering the precise wording mark schemes reward.

What the Cambridge 0610 syllabus says

Official 2026-2028 spec

These are the exact learning objectives Cambridge sets for this topic. Match the command word (Describe, Explain, State, etc.) in your answer to score full marks.

  1. State State the main features used to place animals and plants into the appropriate kingdoms
  2. State State the main features used to place organisms into groups within the animal kingdom, limited to: (a) the main groups of vertebrates: mammals, birds, reptiles, amphibians, fish (b) the main groups of arthropods: myriapods, insects, arachnids, crustaceans
  3. Classify Classify organisms using the features identified in 1.3.1 and 1.3.2
  4. State State the main features used to place all organisms into one of the five kingdoms: animal, plant, fungus, prokaryote, protoctist Supplement
  5. State State the main features used to place organisms into groups within the plant kingdom, limited to ferns and flowering plants (dicotyledons and monocotyledons) Supplement
  6. Classify Classify organisms using the features identified in 1.3.4 and 1.3.5 Supplement
  7. State State the features of viruses, limited to a protein coat and genetic material Supplement
Key Concept Flip

What are the five kingdoms used to classify organisms?

Answer Flip

The five kingdoms are Animal, Plant, Fungus, Prokaryote (Bacteria), and Protoctist.

Example: Humans belong to the Animal kingdom, while mushrooms belong to the Fungi kingdom.
Key Concept Flip

What are the key features that classify vertebrates?

Answer Flip

Vertebrates are classified by having a backbone (vertebral column), an internal skeleton, and a closed circulatory system.

Example: Mammals, birds, reptiles, amphibians, and fish all belong to this group.
Key Concept Flip

What features distinguish mammals from other vertebrates?

Answer Flip

Mammals possess fur or hair, mammary glands (producing milk for offspring), and typically give birth to live young.

Example: Humans, dogs, and whales are all mammals.
Key Concept Flip

What features distinguish birds from other vertebrates?

Answer Flip

Birds have feathers, wings, lay hard-shelled eggs, and possess a beak (no teeth). Their bones are often hollow to reduce weight for flight.

Example: Eagles, penguins, and sparrows are birds.
Key Concept Flip

List the main groups of arthropods.

Answer Flip

The main groups of arthropods are myriapods (many legs), insects (six legs), arachnids (eight legs), and crustaceans (aquatic, many legs).

Example: Centipedes are myriapods, ants are insects, spiders are arachnids, and crabs are crustaceans.
Key Concept Flip

What are the key differences between dicotyledon and monocotyledon flowering plants?

Answer Flip

Dicotyledons have two cotyledons (seed leaves), net-like leaf veins, and vascular bundles in a ring arrangement. Monocotyledons have one cotyledon, parallel leaf veins, and scattered vascular bundles.

Example: Beans are dicots and grass is a monocot.
Key Concept Flip

What are the main features of viruses?

Answer Flip

Viruses are characterized by a protein coat (capsid) enclosing genetic material (DNA or RNA). They are acellular and require a host cell to replicate.

Example: HIV and influenza viruses have these features.
Key Concept Flip

Describe the characteristics used to classify organisms into the plant kingdom.

Answer Flip

Plants are multicellular, eukaryotic organisms that possess chloroplasts for photosynthesis and have cell walls made of cellulose. Ferns and flowering plants are two of the main plant groups.

Example: Mosses and trees are in the plant kingdom.
Key Concept Flip

What features distinguish reptiles from other vertebrates?

Answer Flip

Reptiles are characterized by having dry, scaly skin, laying amniotic eggs (usually on land), and being cold-blooded (ectothermic).

Example: Snakes, lizards, and crocodiles are reptiles.
Key Concept Flip

What features distinguish amphibians from other vertebrates?

Answer Flip

Amphibians have moist skin, typically undergo metamorphosis (aquatic larval stage to terrestrial adult), and lay eggs in water.

Example: Frogs and salamanders are amphibians.

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1.2 Concept and uses of classification systems 2.1 Cell structure

More topics in Unit 1 — Characteristics and classification of living organisms

Features of organisms sits alongside these Biology decks in the same syllabus unit. Each uses the same spaced-repetition system, so progress in one informs the next.

1.1 Characteristics of living organisms

10 flashcards
1.2 Concept and uses of classification systems

10 flashcards

Cambridge syllabus keywords to use in your answers

These are the official Cambridge 0610 terms tagged to this section. Mark schemes credit responses that use the exact term — weave them into your answers verbatim rather than paraphrasing.

feature characteristic identify key dichotomous key organism external feature

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How to study this Features of organisms deck

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