Masters of camouflage
Tests: 6 of 11 right · Exam: 3 of 4 right · Kind: ★ · Understood: 10 of 15 · Run: 2026-10-18, commit f3c23ea72
Lesson 189 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.
Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.
Test 1 · ★ · right ✓
In Finding Dory, Hank the octopus has only 7 arms and blends into walls. How many arms does a normal octopus have?
- 1. 8 — ← Mova's choice · ✓ the right answer · no support
- 2. 7 — no support
- 3. 6 — no support
- 4. 10 — no support
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
Test 2 · ★ · right ✓
«Hank the septopus and 2 normal octopuses, how many arms»
- 1. 23 — ← Mova's choice · ✓ the right answer · no support
- 2. 22 — no support
- 3. 24 — no support
- 4. 21 — no support
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
Test 3 · ★ · right ✓
In Moana, the giant crab Tamatoa covers his shell with shiny treasure to look fancy. Why do real decorator crabs cover their shells?
- 1. To hide from predators — ← Mova's choice · ✓ the right answer · score 5
- 2. To keep their shells warm — score 1
- 3. To show off to other crabs on the reef — no support
- 4. To catch the eye of a mate — no support
Why: It took the question to ask why something happens (its cause). It chose option 1 with score 5, against 1 for the next best. Its support: lesson 189, line 16: «Decorator crabs stick bits of sponge and seaweed on their shells to hide, and they change their decorations when they move to a new place.», reached through the option's own match among the sentences about the question's things. What matched: the same action «hide» (+3); the same doer «decorator crabs» (+2). · the question and its options parsed, with trees and pragmatics
Test 4 · ★ · wrong ✗
«4 stick insects on a branch, 6 legs each, how many legs»
- 1. 28 — ← Mova's choice · no support
- 2. 24 — ✓ the right answer · no support
- 3. 20 — no support
- 4. 16 — no support
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
Test 5 · ★ · wrong ✗
«2 tigers in the long grass, how many stripy tails n ears»
- 1. 8 — ← Mova's choice · no support
- 2. 10 — no support
- 3. 4 — no support
- 4. 6 — ✓ the right answer · no support
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
Test 6 · ★ · right ✓
«tigers are bright orange, they'd never hide from a deer, obviously» What is right?
- 1. Right, deer always see them — score 8
- 2. Tigers are invisible to everyone — no support
- 3. Deer cannot see orange well, so the tiger blends into the grass for them — ← Mova's choice · ✓ the right answer · score 11
- 4. Deer only see orange — score 8
Why: It took the question to ask which statement is true. It chose option 3 with score 11, against 8 for the next best. Its support: lesson 19, line 3: «To us a tiger is bright orange, but deer cannot see red and orange well, so to them the striped tiger looks greenish and melts into the grass and shadows.», reached through the same lesson line as the sentence the question matched. What matched: the same action «see» (+5); the same doer «deer» (+3); the same property (+3). · the question and its options parsed, with trees and pragmatics
Test 7 · ★ · right ✓
What would happen to a pale moth on a soot-blackened tree?
- 1. Birds would ignore it — no support
- 2. It would become invisible — no support
- 3. It would turn black at once to match the bark — no support
- 4. Birds would spot it more easily — ← Mova's choice · ✓ the right answer · score 1
Why: It took the question to ask which statement is true. It chose option 4 with score 1, the only option with support. Its support: lesson 121, line 15: «Cats climb up trees easily but find coming down hard, because all their claws point the wrong way for going down head-first.», reached through the option's own match among the sentences about the question's things. What matched: the same property (+3); the same thing acted on «trees» (+1). Against it: a different doer (counts against) (-1); a different action (counts against) (-2). · the question and its options parsed, with trees and pragmatics
Test 8 · ★ · wrong ✗
«that branch has a broken bit that just opened its eyes!!» What is it most likely?
- 1. A sleeping squirrel curled up on a branch — ← Mova's choice · no support
- 2. A potoo pretending to be a stump — ✓ the right answer · no support
- 3. A tree fungus — no support
- 4. A stick insect — no support
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
Test 9 · ★ · wrong ✗
What would happen if a decorator crab moved from a sponge reef to a seaweed patch?
- 1. It would change its decorations to match — ✓ the right answer · score 0
- 2. It would turn green by itself — score 3
- 3. It would shed its shell — ← Mova's choice · score 5
- 4. It would stay dressed in the same sponge forever — score 2
Why: It took the question to ask what happens next. It chose option 3 with score 5, against 3 for the next best. Its support: lesson 1, line 9: «A hermit crab protects its soft, curled body inside an empty sea snail shell and moves into a bigger shell as it grows; crabs sometimes line up by size and swa…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «crabs» (+3); the same thing acted on «shells» (+3). Against it: a different action (counts against) (-1). The right option, 1, scored 0. · the question and its options parsed, with trees and pragmatics
Test 10 · ★ · right ✓
«flounder's face is all wonky, was it born like that?» What is right?
- 1. Yes, flounders hatch wonky — no support
- 2. It got squashed flat by a passing whale, and one eye was pushed over — no support
- 3. It is two fish stuck together — no support
- 4. It hatched with eyes on both sides, and one moved over as it grew — ← Mova's choice · ✓ the right answer · score 2
Why: It took the question to ask which statement is true. It chose option 4 with score 2, the only option with support. Its support: lesson 154, line 14: «Owls are good hunters but not cleverer than other birds; an owl's big face is mostly eyes and ears for hunting, and crows, ravens and parrots do much better in…», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+2). · the question and its options parsed, with trees and pragmatics
Test 11 · ★ · wrong ✗
«saw a pink orchid eat a fly, plants that eat flies everywhere» What is more likely?
- 1. The fly was sleeping — no support
- 2. The flower was made of plastic, and the fly got stuck to the glue — no support
- 3. Orchids always eat flies — ← Mova's choice · score 2
- 4. It was an orchid mantis, an insect that looks like a flower — ✓ the right answer · no support
Why: It took the question to ask which statement is true. It chose option 3 with score 2, the only option with support. Its support: lesson 148, line 14: «Spiders in homes eat flies, mosquitoes and other pests, and all the spiders in the world eat hundreds of millions of tonnes of insects a year.», reached through the remembered sentence the question matched. What matched: the same thing acted on «flies» (+4); the same action «eat» (+1). Against it: a different doer (counts against) (-3). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · wrong ✗
Identify the means by which the cuttlefish alters its colouration.
- 1. It applies its own ink to its skin — ← Mova's choice · score 8
- 2. It replaces its skin entirely — no support
- 3. Specialised skin cells expand and contract to display different pigments — ✓ the right answer · no support
- 4. It ingests pigmented food — no support
Why: It took the question to ask which statement is true. It chose option 1 with score 8, the only option with support. Its support: lesson 92, line 13: «Cuttlefish change colour and pattern in less than a second using millions of tiny colour sacs in the skin; they seem to be colour-blind, yet they still match t…», reached through the same lesson line as the sentence the question matched. What matched: the same action «use» (+5); the same doer «cuttlefish» (+3). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Exam question 2 · formal language · right ✓
Which of the following statements most accurately characterises the camouflage of the tiger in relation to deer?
- 1. It relies upon remaining entirely invisible — score 5
- 2. Its stripes disrupt its outline, and deer, unable to perceive orange well, see it as blending with vegetation — ← Mova's choice · ✓ the right answer · score 10
- 3. Deer perceive orange more vividly than human beings — score 6
- 4. The stripes serve exclusively to regulate temperature — score 5
Why: It took the question to ask who or what does it. It chose option 2 with score 10, against 6 for the next best. Its support: lesson 189, line 13: «Tigers' stripes break up their outline in tall grass and shadows, deer cannot see orange well, and no two tigers have the same stripes.», reached through the same lesson line as the sentence the question matched. What matched: the same action «break up» (+3); it fills the role the question asks for (+3); the same doer «stripes» (+2); the same thing acted on «outline» (+2). · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · right ✓
Ascertain the consequence for moths of the darkening of tree bark by industrial soot.
- 1. All moths perished without distinction — no support
- 2. Dark moths survived in greater numbers than pale ones — ← Mova's choice · ✓ the right answer · score 4
- 3. Pale moths survived in greater numbers on the darkened trees — score 4
- 4. The moths were unaffected — no support
Why: It took the question to ask which statement is true. It chose option 2 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 189, line 12: «Many moths rest still on trees looking like bark, and when factory soot darkened trees, dark moths survived better than pale ones.», reached through the option's own match among the sentences about the question's things. What matched: the same action «survive» (+2); the same circumstance (+2). · the question and its options parsed, with trees and pragmatics
Exam question 4 · formal language · right ✓
Select the response consistent with the established facts concerning the potoo.
- 1. It is a species of moth — no support
- 2. It resembles a dead stump and perceives its surroundings through notches in its closed eyelids — ← Mova's choice · ✓ the right answer · score 2
- 3. It conceals itself beneath the sea floor — no support
- 4. It alters its colour within one second — no support
Why: It took the question to ask which statement is true. It chose option 2 with score 2, the only option with support. Its support: lesson 189, line 7: «The potoo sits still on a branch looking exactly like a dead stump, and even with its eyes shut it can see through notches in its eyelids.», reached through the option's own match among the sentences about the question's things. What matched: the same place «notches» (+4). Against it: a different action (counts against) (-2). · the question and its options parsed, with trees and pragmatics
This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/189-masters-of-camouflage/