Counting animals: eyes, ears, hearts, trunks, tentacles, teeth

Tests: 3 of 11 right · Exam: 2 of 4 right · Kind: plain · Understood: 13 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 41 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 ✓

«octopus has 8 tentacles innit» What is right?

1. No, an octopus has 10 tentacles, same as any squid has — score 8
2. Yes, and it has 2 more short arms on its back — score 8
3. Yes, every single limb of an octopus is a tentacle — no support
4. No, an octopus has 8 arms; squids have the 2 tentacles — ← Mova's choice · ✓ the right answer · score 10

Why: It took the question to ask which statement is true. It chose option 4 with score 10, against 8 for the next best. Its support: lesson 41, line 10: «A squid has 8 arms and 2 long tentacles with suckers only on the club at their tips; an octopus has 8 arms and no tentacles at all.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «squid» (+5); the same thing acted on «8 arms» (+3); the same light verb (be, have, do, get, go) (+2). · the question and its options parsed, with trees and pragmatics

Test 2 · wrong ✗

In a cartoon a spider has two huge cute eyes. What would a real spider most likely have?

1. 100 tiny eyes all over its body — score 7
2. 8 eyes in two or three rows — ✓ the right answer · score 7
3. 1 big eye in the middle — ← Mova's choice · score 8
4. 2 eyes, just like the cartoon — score 7

Why: It took the question to ask what it is done to. It chose option 3 with score 8, against 7 for the next best. Its support: lesson 41, line 4: «In cartoons octopuses wave «tentacles», every spider has two big eyes and the centipede proudly wears 100 shoes; real animals break every one of those rules, s…», reached through the remembered sentence the question matched. What matched: the same doer «spider» (+4); the same light verb (be, have, do, get, go) (+3); the same property (+1); it fills the role the question asks for (+1). Against it: the same thing acted on «two big eyes» (-1). The right option, 2, scored 7. · the question and its options parsed, with trees and pragmatics

Test 3 · wrong ✗

«my bug book calls it a hundred-legger, so it's got 100 legs, end of» What is right?

1. Yes, every centipede in the world has exactly 100 legs, mate — ← Mova's choice · score 8
2. No, all centipedes have exactly 1,000 legs instead — score 8
3. No centipede has exactly 100 legs, the pairs are always odd — ✓ the right answer · no support
4. Yes, but only the grown-up ones, babies have fewer — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 8, tied with another option at 8 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 41, line 16: «No centipede has exactly 100 legs: they have from 15 to 191 pairs, always an odd number of pairs; the leggiest known animal is an Australian millipede found in…», reached through the remembered sentence the question matched. What matched: the same thing acted on «100 legs» (+4); the same doer «centipede» (+2); the same light verb (be, have, do, get, go) (+2). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 4 · right ✓

«lost my big tooth playing footie, it'll grow back like a shark's» What is right?

1. No, adult teeth never grow back; sharks regrow theirs, we do not — ← Mova's choice · ✓ the right answer · score 3
2. Yes, people grow a whole new set of teeth every ten years or so — no support
3. No, but a shark tooth can be glued into the gap instead — no support
4. Yes, but only if you brush the gap twice every single day — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 3, the only option with support. Its support: lesson 41, line 13: «Children have 20 milk teeth, which fall out roughly from age 6 to 12; adults have 32 teeth if all four wisdom teeth come in, and a lost adult tooth never grows…», reached through the option's own match among the sentences about the question's things. What matched: the same action «grow back» (+2); the same doer «lost adult tooth» (+1). · the question and its options parsed, with trees and pragmatics

Test 5 · wrong ✗

What would happen to an earthworm if its skin dried out in the sun?

1. Nothing, worms love hot dry ground — no support
2. Its hearts would beat faster and save it — no support
3. It could not breathe and would die — ✓ the right answer · score -4
4. It would breathe through its lungs instead — ← Mova's choice · score 2

Why: It took the question to ask what happens next. It chose option 4 with score 2, against -4 for the next best. Its support: lesson 36, line 3: «Insects wear their skeleton outside like armour, so to grow they split it and climb out, leaving an empty skin like the dragonfly nymph's by the pond, and they…», reached through what followed the sentence the question matched. What matched: the same action «breathe» (+4). Against it: a different doer (counts against) (-2). The right option, 3, scored -4. · the question and its options parsed, with trees and pragmatics

Test 6 · wrong ✗

«pulled a starfish off the rock to take home, it's fine, it'll grow a new arm anyway» What is the best answer?

1. Fine, as long as you keep it in a nice dry box with some sand — no support
2. Fine, starfish feel nothing at all and always grow back whole — ← Mova's choice · score 2
3. Only take the ones that already have a short arm, they're used to it — no support
4. Leave starfish on their rocks; look, count the arms, then let them be — ✓ the right answer · 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 9, line 5: «In SpongeBob SquarePants Patrick Star is famously brainless, and that is the one true joke: a real starfish has no brain at all, yet it walks on hundreds of tu…», reached through the option's own match among the sentences about the question's things. What matched: the same place «all» (+2); the same doer «real starfish» (+1). Against it: a different thing acted on (counts against) (-1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 7 · wrong ✗

In a cartoon, an elephant drinks a whole lake through its trunk like a straw. What does a real elephant do?

1. Never drinks at all, it gets all its water from grass — ← Mova's choice · score 14
2. Drinks through the trunk exactly like a straw, only slower — no support
3. Lowers its head and drinks the water up with its tusks — no support
4. Sucks a few litres into its trunk and squirts it into its mouth — ✓ the right answer · score 11

Why: It took the question to ask what is done. It chose option 1 with score 14, against 11 for the next best. Its support: lesson 21, line 9: «An adult elephant can hold about 8 litres of water in its trunk and then blows it into its mouth; it does not drink through it like a straw, and it drinks well…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same action «drink» (+4); the same doer «elephant» (+4). The right option, 4, scored 11. · the question and its options parsed, with trees and pragmatics

Test 8 · right ✓

«crap, cricket's chirping right by my head, where's its ears even» What is right?

1. It hears through its mouth, no ears — no support
2. On its front legs, just below the knees — ← Mova's choice · ✓ the right answer · score 5
3. On its back, hidden under its wings — no support
4. On its head, tucked under its antennae — no support

Why: It took the question to ask where. It chose option 2 with score 5, the only option with support. Its support: lesson 37, line 16: «Grasshoppers sing by rubbing a hind leg against a wing and crickets by rubbing their wings together; crickets have their ears on their front legs.», reached through the option's own match among the sentences about the question's things. What matched: it fills the role the question asks for (+3); the same place «front legs» (+2); the same property (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 9 · wrong ✗

A scallop has no head. Why might it still need eyes?

1. To see a starfish's shadow and swim away by clapping its shell — ✓ the right answer · score 0
2. To read the numbers on the tags at the fishmonger's shop — no support
3. It does not need them, they are only there for decoration — ← Mova's choice · score 2
4. To find its way back home to the head it once had — no support

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 2, against 0 for the next best. Its support: lesson 41, line 2: «We have one heart, two eyes and two ears on the head, but an octopus has three hearts, a scallop can have about 200 eyes, and a cricket hears with ears on its…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «scallop» (+1); the same thing acted on «200 eyes» (+1). The right option, 1, scored 0. · the question and its options parsed, with trees and pragmatics

Test 10 · wrong ✗

Count them up: an octopus and an earthworm sit side by side in a cartoon. How many hearts together, if the worm's five pairs count as hearts?

1. 11 — ← Mova's choice · score 8
2. 8 — score 8
3. 13 — ✓ the right answer · score 8
4. 4 — score 8

Why: It took the question to ask what it is done to. It chose option 1 with score 8, tied with another option at 8 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 26, line 2: «Stand under the life-size blue whale model hanging in a museum: about 30 metres long, about as long as two and a half buses, around 150 tonnes, with one heart…», reached through the option's own match among the sentences about the question's things. What matched: the same action «weigh» (+3); the same circumstance (+3); a different doer (counts against) (+2). The right option, 3, scored 8. · the question and its options parsed, with trees and pragmatics

Test 11 · wrong ✗

«shut up, a snail hasn't got any teeth» What is right?

1. It has exactly 20 teeth, the same as a child — ← Mova's choice · no support
2. It has thousands of tiny teeth on its radula — ✓ the right answer · no support
3. It has two big front teeth like a rabbit — no support
4. It has no teeth and just sucks up juice — 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

Exam question 1 · formal language · right ✓

State the number of hearts possessed by an octopus and identify the function of the smaller ones.

1. Three hearts, of which the two smaller propel the blood through the gills — ← Mova's choice · ✓ the right answer · score 10
2. One heart only, which serves the whole of the body and all eight arms — no support
3. Eight hearts, of which each one serves a single arm of the animal — no support
4. Two hearts, of which each one supplies blood to one of the two eyes — score 7

Why: It took the question to ask which statement is true. It chose option 1 with score 10, against 7 for the next best. Its support: lesson 39, line 6: «An octopus has eight arms, three hearts and blue blood: two hearts pump blood through the gills and the third round the body.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «two hearts» (+5); the same thing acted on «blood» (+3); the same place «gills» (+3). Against it: a different action (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

Which of the following statements most accurately characterises the limbs of the squid as distinct from those of the octopus?

1. The squid possesses six arms and two fins, whereas the octopus possesses eight arms — score 4
2. The octopus possesses two tentacles and eight arms, whereas the squid possesses none — ← Mova's choice · score 6
3. Both animals possess eight tentacles and no arms, being indistinguishable thereby — no support
4. The squid possesses eight arms and two tentacles; the octopus, eight arms and none — ✓ the right answer · score 4

Why: It took the question to ask who or what does it. It chose option 2 with score 6, against 4 for the next best. Its support: lesson 39, line 5: «Cartoon octopuses wave eight «tentacles» and kidnap ships, but scientists call octopus limbs arms, giant squid live far below in the dark, and even the colossa…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+3); the same doer «cartoon octopuses» (+2); the same thing acted on «eight tentacles» (+2). Against it: a different action (counts against) (-1). The right option, 4, scored 4. · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · right ✓

Select the response consistent with the established facts concerning the legs of the centipede.

1. The pairs of legs are invariably odd in number, so one hundred legs never occurs — ← Mova's choice · ✓ the right answer · score 8
2. Every centipede possesses precisely one hundred legs, as its common name states — score 6
3. The number of legs increases by one pair with each year of the animal's age — no support
4. Every centipede possesses precisely one thousand legs, ten for each segment — score 6

Why: It took the question to ask which statement is true. It chose option 1 with score 8, against 6 for the next best. Its support: lesson 41, line 16: «No centipede has exactly 100 legs: they have from 15 to 191 pairs, always an odd number of pairs; the leggiest known animal is an Australian millipede found in…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «legs» (+5); the same place «15 pairs» (+3). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Ascertain the number of teeth comprising the first, or milk, dentition of a human child.

1. Thirty-two — ← Mova's choice · no support
2. Twenty — ✓ the right answer · no support
3. Twenty-four — no support
4. Twenty-eight — 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

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/41-counting-animals/