Free · no sign-up · no time limit
Ready-made multiple-choice practice quizzes, hand-checked. Take any free quiz online — every answer comes with an explanation, and every quiz page has a full answer key to revise from.
Loading quizzes
Free · no sign-up · no time limit
Ready-made multiple-choice practice quizzes, hand-checked. Take any free quiz online — every answer comes with an explanation, and every quiz page has a full answer key to revise from.
Animals
Uncover the anatomical secrets and survival strategies of creatures that live their lives burrowed deep underground. Answer each question to see whether you got it right, with an explanation every time.
A free 10-question multiple-choice practice test on Animals. Each question has one correct answer and a short explanation, and the full answer key below the player doubles as a study sheet. No account, no time limit — take it as often as you like.
This is a free, 10-question multiple-choice quiz. Answer each question to see whether you got it right, with an explanation for every answer. There is no sign-up and no time limit — take it as many times as you like, and use the answer key above to revise before or after.
Correct answer: ANaked mole-rat
Naked mole-rats live in underground desert warrens in East Africa, displaying insect-like eusociality with non-breeding worker castes.
Correct answer: AStar-nosed mole
The star-nosed mole's nasal tentacles house tens of thousands of microscopic Eimer's organs, processing tactile prey signals in fractions of a second.
Correct answer: APaddle-like spade forelimbs with extra bones
Moles have outward-facing, shovel-like forepaws anchored by a sickle-shaped extra bone (prepollex) to provide leverage against compacted dirt.
Correct answer: APeriodical cicada
Periodical cicadas stay hidden in root systems for well over a decade before tunneling to the surface en masse to molt and breed.
Correct answer: AAmphisbaenian (Worm lizard)
Amphisbaenians are specialized burrowing squamates with heavy reinforced skulls and ringed body segments that allow movement backwards and forwards.
Correct answer: AMeerkat
Meerkats coordinate foraging through elaborate burrow networks, assigning rotating sentinels to watch the skies for raptors.
Correct answer: AEarthworm
Earthworms pass soil through their muscular gizzards, leaving nutrient-dense vermicompost casts that support healthy soil architecture.
Correct answer: ATrapdoor spider
Trapdoor spiders camouflage their burrow lids with moss and soil, darting out when silk tripwires alert them to passing insects.
Correct answer: ACaecilians
Caecilians are subterranean amphibians that lack limbs and rely on sensory tentacles between their eyes and nostrils to track prey in soil.
Correct answer: AMarsupial mole
Marsupial moles have fused neck vertebrae and shovel-like claws, allowing them to literally 'swim' through subterranean sands without leaving open tunnels.