---
title: Antarctica: emperor huddles, krill, clear-blooded fish and stone-ste… — how Mova does on the tests · Biology
description: Lesson 170 of the biology course of Mova's primary school: 8 of 12 tests right, exam 2 of 4, every question with the options, the student's choice, the right answer and why it chose.
---

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# Antarctica: emperor huddles, krill, clear-blooded fish and stone-stealing penguins

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**Tests:** 8 of 12 right · **Exam:** 2 of 4 right · **Kind:** ★★★ · **Understood:** 12 of 16 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 170 of the biology course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: [the lesson in the corpora](https://md.mova.elamur.ai/free/en/corpora/school/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/).

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Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: [the lesson's questions in the corpora](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/).

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### Test 1 · ★★★ · wrong ✗ {#t1}

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In an advert a polar bear shares a drink with penguins on the ice. What is real?

- **1.** Polar bears hunt penguins every day — score 1
- **2.** Penguins live with polar bears in the Arctic — **← Mova's choice** · score 11
- **3.** They never meet in the wild: polar bears live in the north and penguins in the south — **✓ the right answer** · score 8
- **4.** They are best friends in Antarctica — score 5

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 11, against 8 for the next best. Its support: lesson 170, line 4: «Cartoons and adverts often show polar bears chasing penguins, but that can never happen in the wild: polar bears live in the Arctic in the far north, and pengu…», reached through the same lesson line as the sentence the question matched. What matched: the same action «live» (+5); the same place «arctic» (+3); the same circumstance (+3). The right option, 3, scored 8. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t1/)

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### Test 2 · ★★★ · wrong ✗ {#t2}

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«in Happy Feet the penguins tap dance to sing a heart song, do they really» What is right?

- **1.** Yes, they sing pop songs — **← Mova's choice** · score 5
- **2.** No, emperor penguins know each other by their calls, not by dancing — **✓ the right answer** · score 2
- **3.** Yes, every penguin tap dances — no support
- **4.** No, penguins make no sounds at all, they find each other by their smell — score 1

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 5, against 2 for the next best. Its support: lesson 163, line 14: «The indri is the biggest living lemur and sings loud songs in family groups; scientists found rhythms in indri songs a little like music.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «loud songs» (+3); the same action «sing» (+2). The right option, 2, scored 2. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t2/)

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### Test 3 · ★★★ · right ✓ {#t3}

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«5 emperor dads holding eggs, how many feet with an egg on top»

- **1.** 10 — **← Mova's choice** · **✓ the right answer** · no support
- **2.** 15 — no support
- **3.** 20 — no support
- **4.** 5 — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t3/)

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### Test 4 · ★★★ · right ✓ {#t4}

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«an adélie keeps nicking stones off his mate next door, what a crook» What is right?

- **1.** Stealing stones is common, because good stones keep eggs above meltwater — **← Mova's choice** · **✓ the right answer** · score 7
- **2.** He is building a road — no support
- **3.** He is collecting stones to sell to the other penguins in exchange for fish — score -2
- **4.** Penguins never steal — score 2

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**Why:** It took the question to ask what it is done to. It chose option 1 with score 7, against 2 for the next best. Its support: lesson 170, line 5: «Emperor penguins huddle in big groups to keep warm in the Antarctic winter, and the males hold the egg on their feet under a warm fold of skin for about two mo…», reached through the same lesson line as the sentence the question matched. What matched: the same action «hold» (+4); it fills the role the question asks for (+3); the same thing acted on «egg» (+2). Against it: a different doer (counts against) (-2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t4/)

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### Test 5 · ★★★ · wrong ✗ {#t5}

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What would happen to Antarctic penguins, seals and whales if the krill disappeared?

- **1.** They would all move to the Arctic and live there instead — **← Mova's choice** · score 4
- **2.** They would eat more polar bears — score -1
- **3.** Nothing, because none of them ever eat krill — score 1
- **4.** Many would lose their main food and could starve — **✓ the right answer** · no support

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**Why:** It took the question to ask what happens next. It chose option 1 with score 4, against 1 for the next best. Its support: lesson 169, line 7: «Bowhead whales can smash through ice with their heads to make breathing holes, and they may live for over two hundred years; old harpoon tips from the 1800s ha…», reached through a sentence linked to the one the question matched. What matched: the same action «live» (+2); the same doer «whales» (+2). The right option, 4, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t5/)

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### Test 6 · ★★★ · right ✓ {#t6}

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«biggest land animal living in Antarctica all year is the penguin, obvs» What is right?

- **1.** Yes, the emperor penguin, the biggest of them all — score 3
- **2.** No, it is the polar bear, which lives there too — score 2
- **3.** No, it is a tiny wingless midge, because penguins feed at sea — **← Mova's choice** · **✓ the right answer** · score 5
- **4.** No, it is the walrus — no support

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**Why:** It took the question to ask which statement is true. It chose option 3 with score 5, against 3 for the next best. Its support: lesson 170, line 6: «Antarctic krill are small shrimp-like animals that live in huge swarms, and the weight of all Antarctic krill may be more than the weight of all humans.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «antarctic krill» (+3); the same thing acted on «small like animals» (+1); the same light verb (be, have, do, get, go) (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t6/)

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### Test 7 · ★★★ · wrong ✗ {#t7}

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A fish caught near Antarctica has see-through, colourless blood. Why might it still get oxygen?

- **1.** It eats red berries for oxygen — score 2
- **2.** It does not need any oxygen — score 3
- **3.** Oxygen dissolves well in icy water, so its blood can carry enough without red cells — **✓ the right answer** · score 3
- **4.** It breathes air at the surface — **← Mova's choice** · score 6

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**Why:** It took the question to ask which statement is true. It chose option 4 with score 6, against 3 for the next best. Its support: lesson 66, line 5: «Your nose cleans the air, a sneeze blasts out dust, and the same breath makes your voice when it buzzes past your vocal cords; whales breathe air too, but fish…», reached through the same lesson line as the sentence the question matched. What matched: the same action «breathe» (+5); the same thing acted on «air» (+1). The right option, 3, scored 3. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t7/)

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### Test 8 · ★★★ · right ✓ {#t8}

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Why might penguins whose eggs sat in melting slush not hatch, while those on stone nests did?

- **1.** Slush is too warm for eggs — score 1
- **2.** Stones are full of food for the chicks to eat when they hatch — no support
- **3.** The stones kept the eggs above the cold meltwater — **← Mova's choice** · **✓ the right answer** · score 6
- **4.** Seals cannot reach stones — score 2

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**Why:** It took the question to ask why something happens (its cause). It chose option 3 with score 6, against 2 for the next best. Its support: lesson 170, line 11: «Adélie penguins build nests of small stones to keep their eggs above melting snow, and they often steal stones from their neighbours' nests.», reached through the cause of the sentence the question matched. What matched: the same action «keep» (+4); the same thing acted on «eggs» (+4). Against it: a different doer (counts against) (-2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t8/)

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### Test 9 · ★★★ · right ✓ {#t9}

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An emperor penguin huddle is filmed from above for an hour. What would you see?

- **1.** Birds slowly shuffling, so the edge ones move in and the middle ones move out — **← Mova's choice** · **✓ the right answer** · no support
- **2.** The birds flying away in turns — no support
- **3.** Every bird standing still in the same place — no support
- **4.** The birds sleeping under the snow — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t9/)

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### Test 10 · ★★★ · right ✓ {#t10}

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«albatross glided all day n never flapped, it must be exhausted» What is right?

- **1.** No, it locks its wings and gliding uses almost no energy — **← Mova's choice** · **✓ the right answer** · score 5
- **2.** Yes, it will soon get tired and drop down into the sea — no support
- **3.** Yes, gliding is much harder work than flapping — no support
- **4.** No, albatrosses do not fly — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 5, the only option with support. Its support: lesson 170, line 16: «The wandering albatross has the longest wingspan of any living bird, over three metres, and it can lock its wings in place so gliding uses almost no energy.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «wings» (+3); the same action «lock» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t10/)

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### Test 11 · ★★★ · right ✓ {#t11}

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A moss patch on an Antarctic rock is only as big as your hand. Why might it be hundreds of years old?

- **1.** Someone planted it long ago — no support
- **2.** Mosses there grow extremely slowly in the cold — **← Mova's choice** · **✓ the right answer** · score 5
- **3.** Moss never grows at all — score 1
- **4.** It was frozen and brought from the Arctic by ships long ago — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 5, against 1 for the next best. Its support: lesson 170, line 15: «Only two kinds of flowering plants grow in Antarctica, and its lichens and mosses grow so slowly that some patches are hundreds of years old.», reached through a sentence linked to the one the question matched. What matched: the same action «grow» (+2); the same doer «lichens» (+2); the same property (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t11/)

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### Test 12 · ★★★ · right ✓ {#t12}

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«a Weddell seal lives under the ice, so how does it breathe, stupid seal» What is right?

- **1.** It keeps breathing holes open in the ice — **← Mova's choice** · **✓ the right answer** · score 9
- **2.** It never needs air — no support
- **3.** It breathes water like a fish under the ice — score 7
- **4.** It breathes through a straw — score 5

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**Why:** It took the question to ask what something is like. It chose option 1 with score 9, against 7 for the next best. Its support: lesson 170, line 8: «Weddell seals live farther south than any other mammal and keep breathing holes open in the ice, and their underwater calls sound like science fiction lasers.», reached through the remembered sentence the question matched. What matched: the same thing acted on «holes» (+4); the same place «ice» (+4); it fills the role the question asks for (+4). Against it: a different action (counts against) (-3). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/t12/)

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### Exam question 1 · formal language · right ✓ {#e1}

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Identify the principal reason for which no polar bear is encountered in the wild in Antarctica.

- **1.** The species is confined to the Arctic regions of the northern hemisphere — **← Mova's choice** · **✓ the right answer** · no support
- **2.** The species is concealed beneath the ice — no support
- **3.** The species was exterminated by penguins — no support
- **4.** The species migrates to Antarctica exclusively in winter and returns in spring — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/e1/)

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### Exam question 2 · formal language · wrong ✗ {#e2}

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Select the response consistent with the established facts concerning the blood of the Antarctic icefish.

- **1.** It is frozen throughout the winter — no support
- **2.** It is coloured blue by reason of the copper it contains — **← Mova's choice** · score 4
- **3.** It is composed entirely of sea water — no support
- **4.** It is colourless by reason of the absence of red blood cells — **✓ the right answer** · no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 4, the only option with support. Its support: lesson 41, line 5: «An octopus has 3 hearts: two small gill hearts push its blue, copper-based blood through the gills, and one main heart pumps it round the body; copper-based bl…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «blue based blood» (+3); the same property (+3). Against it: a different action (counts against) (-2). The right option, 4, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/e2/)

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### Exam question 3 · formal language · wrong ✗ {#e3}

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Which of the following statements most accurately characterises the ecological position of Antarctic krill?

- **1.** They are a species of flowering plant — **← Mova's choice** · no support
- **2.** They inhabit the freshwater lakes of the Arctic — no support
- **3.** They constitute a principal food of penguins, seals, fish and whales and may exceed in total mass the whole of humanity — **✓ the right answer** · no support
- **4.** They are a minor species consumed by no other animal — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/e3/)

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### Exam question 4 · formal language · right ✓ {#e4}

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Ascertain the reason for which Adélie penguins construct their nests from stones.

- **1.** The sharpening of their beaks — no support
- **2.** The storage of food for the winter — no support
- **3.** The concealment of the eggs from leopard seals — no support
- **4.** The elevation of the eggs above melting snow and water — **← Mova's choice** · **✓ the right answer** · score 6

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**Why:** It took the question to ask which statement is true. It chose option 4 with score 6, the only option with support. Its support: lesson 7, line 19: «Adelie penguins build nests of stones that lift the eggs above meltwater, and because good stones are hard to find they steal them from their neighbours; pengu…», reached through the same lesson line as the sentence the question matched. What matched: the same action «lift» (+5); the same thing acted on «eggs» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/170-antarctica-emperor-huddles-krill-clear-blooded-fish-and-stone-stealing-penguins/e4/)

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- ← previous: [169. The Arctic Ocean: walruses, bowheads, the 400-ye…](https://md.mova.elamur.ai/free/en/school-run/biology/169-the-arctic-ocean-walruses-bowheads-the-400-year-shark-and-the-unicorns-tooth/)
- next →: [171. The Southern Ocean: blue whales, colossal squid…](https://md.mova.elamur.ai/free/en/school-run/biology/171-the-southern-ocean-blue-whales-colossal-squid-and-life-under-the-ice/)
- ↑ back to [Biology](https://md.mova.elamur.ai/free/en/school-run/biology/)