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Word formation CEFR B2 Topic: The surprising intelligence and behaviour of octopuses

The Secret Intelligence of Octopuses

What this tests: word building — prefixes, suffixes, negative forms and changing a word's part of speech.

Instructions

For questions 1–8, use the word in capitals at the end of each line to form a word that fits the gap in the same line.

Octopuses are among the most INTELLIGENCE creatures in the ocean, capable of solving puzzles that would challenge many mammals.

Scientists have long been fascinated by an ABLE that lets them change colour and texture almost instantly, blending seamlessly into their surroundings.

This remarkable TRANSFORM is controlled by specialised skin cells that respond to signals from a surprisingly complex nervous system.

Unlike most invertebrates, an octopus has USUAL distributed intelligence, with two-thirds of its neurons located in its arms rather than its brain.

This allows each arm to act with a degree of DEPEND, exploring crevices and manipulating objects independently.

Researchers studying octopus behaviour have noted CONVINCE evidence of curiosity, playfulness, and even problem-solving under pressure.

Such EXPECT findings have led many biologists

to reconsider what counts as AWARE in the animal kingdom, challenging long-held assumptions about consciousness beyond the human brain.

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🎬 Video walkthrough

This exercise read aloud, sentence by sentence: a pause to answer each question, the hint after the pause, then the answer and why. It gives the answers — try the exercise first.

9 min. All video walkthroughs