--- title: Coral reef builders: polyps, bleaching, sand from parrotfi… — the lesson's questions with trees and pragmatics · Biology description: The 15 test and exam questions of lesson 172 «Coral reef builders: polyps, bleaching, sand from parrotfish and giant clams» of the biology course of Mova's primary school, each with its options, Mova's choice and the right answer, every sentence with its dependency tree and pragmatics. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [Biology](https://md.mova.elamur.ai/free/en/corpora/questions/biology/) / Coral reef builders: polyps, bleaching… # Coral reef builders: polyps, bleaching, sand from parrotfish and giant clams The 15 questions of lesson 172 «Coral reef builders: polyps, bleaching, sand from parrotfish and giant clams» of the biology course of Mova's primary school with their options, 79 sentences, every one parsed by Mova with its syntax tree and pragmatics. How the student did on them: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/). - [t1](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t1/) — «diver here, touched a coral, feels like a rock so it's a rock right» What is right? — right ✓ · ★ - [t2](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t2/) — In SpongeBob, Patrick the starfish lives happily on a reef. Which real starfish is a danger to coral reefs? — wrong ✗ · ★ - [t3](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t3/) — What would happen if the sea around a reef stayed too hot for many weeks? — wrong ✗ · ★ - [t4](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t4/) — «my uncle says giant clams snap shut and drown divers, legit?» What is right? — right ✓ · ★ - [t5](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t5/) — «sat on a white beach in the Maldives, someone said it's fish poo lol» Could that be right? — right ✓ · ★ - [t6](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t6/) — Why would a reef not grow in deep, dark water off a tropical island? — right ✓ · ★ - [t7](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t7/) — «3 parrotfish asleep on the reef, each makes a new bubble every night. how many bubbles over 2 nights» — right ✓ · ★ - [t8](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t8/) — A diver sees the sea turn pink with tiny floating bundles one night after a full moon. What is happening? — right ✓ · ★ - [t9](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t9/) — «reefs are tiny, who cares if they die» What is a good answer? — right ✓ · ★ - [t10](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t10/) — «corals only live in hot seas, everyone knows that» What is right? — right ✓ · ★ - [t11](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/t11/) — Divers pull hundreds of crown-of-thorns starfish off a reef. Why? — right ✓ · ★ - [e1](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/e1/) — Which of the following statements most accurately characterises the biological nature of a coral? — wrong ✗ · exam - [e2](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/e2/) — Identify the principal cause of the phenomenon designated coral bleaching. — wrong ✗ · exam - [e3](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/e3/) — Select the response consistent with the established facts concerning the giant clam. — right ✓ · exam - [e4](https://md.mova.elamur.ai/free/en/corpora/questions/biology/172-coral-reef-builders-polyps-bleaching-sand-from-parrotfish-and-giant-clams/e4/) — Ascertain the origin of a considerable proportion of the white sand upon certain tropical beaches. — right ✓ · exam - ← previous: [171. The Southern Ocean: blue whales, colossal squid…](https://md.mova.elamur.ai/free/en/corpora/questions/biology/171-the-southern-ocean-blue-whales-colossal-squid-and-life-under-the-ice/) - next →: [173. Coral reef partners and tricksters: clownfish, c…](https://md.mova.elamur.ai/free/en/corpora/questions/biology/173-coral-reef-partners-and-tricksters-clownfish-cleaners-mimics-and-puffers/) - ↑ back to [Biology](https://md.mova.elamur.ai/free/en/corpora/questions/biology/)