Rodents: the biggest group of mammals and their ever-growing teeth

Tests: 4 of 11 right · Exam: 1 of 4 right · Kind: ★ · Understood: 11 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 316 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 ✓

«does jerry from tom and jerry have the right teeth or what» A real mouse has 16 teeth. How many of those are front gnawing teeth?

1. 4 — ← Mova's choice · ✓ the right answer · no support
2. 16 — no support
3. 8 — no support
4. 2 — 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 · ★ · wrong ✗

Count them: a hamster, a rat and a squirrel smile at you. How many front gnawing teeth do they have together?

1. 24 — ← Mova's choice · score 1
2. 48 — score 1
3. 6 — score 1
4. 12 — ✓ the right answer · score 1

Why: It took the question to ask what it is done to. It chose option 1 with score 1, tied with another option at 1 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 2, line 16: «Scarlet macaws fly in pairs that stay together for many years, nest in tree holes and eat clay from riverbanks, which scientists think gives them scarce salt.», reached through the remembered sentence the question matched. What matched: the same doer «pairs» (+1). The right option, 4, scored 1. · the question and its options parsed, with trees and pragmatics

Test 3 · ★ · wrong ✗

Count them: a rabbit has a small pair hidden behind its big upper front teeth. How many upper front teeth do 2 rabbits have in all?

1. 4 — ← Mova's choice · no support
2. 6 — no support
3. 8 — ✓ the right answer · no support
4. 2 — 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 4 · ★ · right ✓

In Tom and Jerry, Jerry loves big holey cheese above everything. What is closer to the truth for real mice?

1. Mice eat many foods, mostly seeds and grains, and cheese is no special favourite — ← Mova's choice · ✓ the right answer · score 6
2. Mice eat only cheese, and a mouse that cannot find any cheese soon gets ill and dies — score 6
3. Mice eat only cheese with holes in it — score 6
4. Mice cannot digest seeds at all — score 0

Why: It took the question to ask which statement is true. It chose option 1 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 1, line 5: «In Tom and Jerry, Jerry lives in a hole in the wall and dreams of cheese; real house mice do live in the gaps of our houses, but they would much rather eat see…», reached through the same lesson line as the sentence the question matched. What matched: the same action «eat» (+4); the same doer «mice» (+1); a different thing acted on (counts against) (+1). · the question and its options parsed, with trees and pragmatics

Test 5 · ★ · wrong ✗

«my mate says a rabbit is just a big rodent» What is right?

1. No, a rabbit is a kind of cat — ← Mova's choice · score 5
2. Yes, every small furry animal with big front teeth is a rodent — score 3
3. No, a rabbit is a lagomorph, with four upper front teeth — ✓ the right answer · score 1
4. Yes, rabbits are giant mice — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 5, against 3 for the next best. Its support: lesson 200, line 14: «Rabbits are social animals that need lots of space to run and a rabbit friend; pet rabbits can live eight to twelve years.», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+3); the same light verb (be, have, do, get, go) (+2); the same doer «rabbits» (+1). Against it: a different thing acted on (counts against) (-1). The right option, 3, scored 1. · the question and its options parsed, with trees and pragmatics

Test 6 · ★ · wrong ✗

What would happen to a pet hamster kept with only soft food and nothing to gnaw?

1. It would grow extra legs — no support
2. Nothing, because a hamster's teeth stop growing once it lives in a cage — ← Mova's choice · score 5
3. Its teeth would fall out and never come back — no support
4. Its front teeth could grow too long and stop it eating — ✓ the right answer · score 5

Why: It took the question to ask which statement is true. It chose option 2 with score 5, tied with another option at 5 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 222, line 13: «A rat's front teeth never stop growing, so it gnaws to keep them short; the teeth are tough enough to chew through wood, plastic and cables.», reached through the same lesson line as the sentence the question matched. What matched: the same action «grow» (+4); the same doer «front teeth» (+1). The right option, 4, scored 5. · the question and its options parsed, with trees and pragmatics

Test 7 · ★ · wrong ✗

«why do mice have SO many babies, mad» What is the best answer?

1. Mice live for a hundred years — ← Mova's choice · score 5
2. Mice cannot count, so they never know how many babies they have already had — score 4
3. Many animals eat mice, so having lots of babies helps some survive — ✓ the right answer · score 5
4. Babies stay small for ever — score 5

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 5, tied with another option at 5 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 1, line 19: «House mice live in and around buildings and mainly eat seeds, grain and crumbs; the cartoon idea that mice love cheese above everything is not true.», reached through the option's own match among the sentences about the question's things. What matched: the same action «live» (+4); the same doer «house mice» (+1). The right option, 3, scored 5. · the question and its options parsed, with trees and pragmatics

Test 8 · ★ · wrong ✗

«rats chewed the car wires, are they thick or what» What is true?

1. Rats hate the smell of cars and chew the wires so the cars stop working for good — ← Mova's choice · score 4
2. Rats only chew when they are bored of cheese — score 4
3. Rats gnaw to keep their ever-growing teeth short and to get into places — ✓ the right answer · score 4
4. Rats eat electricity for energy — score 3

Why: It took the question to ask which statement is true. It chose option 1 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 316, line 13: «Rats gnaw wires, pipes and wood and can chew through soft metals like lead and aluminium; some house fires have been blamed on chewed wires, reported.», reached through the option's own match among the sentences about the question's things. What matched: the same action «chew» (+3); the same doer «rats» (+1). The right option, 3, scored 4. · the question and its options parsed, with trees and pragmatics

Test 9 · ★ · right ✓

In Ratatouille a rat laughs and has fun. What did scientists really find?

1. Tickled rats make high chirps and come back for more — ← Mova's choice · ✓ the right answer · score 2
2. Rats laugh so loud people can hear across a room — score 2
3. Only cartoon rats can play — score -2
4. Rats cannot feel anything at all — score -2

Why: It took the question to ask what it is done to. It chose option 1 with score 2, tied with another option at 2 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 182, line 12: «Kangaroo rats of North American deserts can live without ever drinking, getting water from seeds and making very dry urine.», reached through the option's own match among the sentences about the question's things. What matched: the same action «make» (+2). · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · right ✓

A squirrel's tooth is cut in half and you look at it from the side. What would you see?

1. Wood inside, like a pencil — no support
2. Hard enamel at the front and softer stuff at the back — ← Mova's choice · ✓ the right answer · score 3
3. A hollow tube full of air — score -1
4. The same soft stuff all the way through, with no hard layer anywhere — no support

Why: It took the question to ask what it is done to. It chose option 2 with score 3, against -1 for the next best. Its support: lesson 200, line 10: «Rabbits eat some of their own droppings, soft ones made at night, to digest their food a second time; this is normal and healthy, and the hard round droppings…», reached through the option's own match among the sentences about the question's things. What matched: the same action «see» (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics

Test 11 · ★ · wrong ✗

«2 mice in the shed in spring, how many by winter??» Which is most likely if there is lots of food?

1. Still exactly 2 — no support
2. About 4, because mice only ever have one litter of two babies a year — ← Mova's choice · score 3
3. Many dozens or more, because they breed fast and often — ✓ the right answer · no support
4. None, mice cannot breed in sheds — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 3, the only option with support. Its support: lesson 120, line 10: «A mother mouse can have a litter of about six to eight babies every few weeks; the babies are born pink and blind and can look after themselves at about three…», reached through the option's own match among the sentences about the question's things. What matched: the same light verb (be, have, do, get, go) (+2); the same doer «mother mouse» (+1). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · right ✓

Identify the principal characteristic by which rodents are distinguished from other mammals.

1. Four pairs of incisors in the upper jaw — no support
2. Long canine teeth adapted for seizing prey — no support
3. The complete absence of teeth — no support
4. A single pair of continuously growing incisors in each jaw — ← Mova's choice · ✓ the right answer · score 5

Why: It took the question to ask which statement is true. It chose option 4 with score 5, the only option with support. Its support: lesson 316, line 2: «What makes a rodent is its teeth: two upper and two lower front teeth that never stop growing, and no long pointed canines at all. The word rodent comes from t…», reached through the same lesson line as the sentence the question matched. What matched: the same action «grow» (+4); the same doer «two upper two lower front teeth» (+1). · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

Select the response consistent with the established facts concerning the dentition of the house mouse.

1. It possesses thirty-two teeth, including prominent canines for seizing prey, with no gap between incisors and molars — ← Mova's choice · no support
2. It possesses forty-two teeth which are shed annually — no support
3. It possesses sixteen teeth, four incisors and twelve molars, separated by a gap and lacking canines — ✓ the right answer · no support
4. It possesses four teeth only, all of which are molars — 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 3 · formal language · wrong ✗

Which of the following statements most accurately characterises the classification of the rabbit?

1. It is an insectivore, possessing no incisors — no support
2. It is a marsupial, possessing a pouch for its young — ← Mova's choice · score 3
3. It is a lagomorph, possessing four upper incisors, and is not a rodent — ✓ the right answer · no support
4. It is a rodent, possessing two upper incisors which grow continuously throughout life — no support

Why: It took the question to ask who or what does it. It chose option 2 with score 3, the only option with support. Its support: lesson 272, line 11: «At the La Brea tar pits in Los Angeles animals got stuck in sticky tar, predators came to eat them and got stuck too, so the pits hold many more meat-eaters th…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+2); the same doer «animals» (+1). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Ascertain the consequence of a failure of a rodent's incisors to meet correctly.

1. The animal grows a further pair of incisors to compensate — ← Mova's choice · no support
2. No consequence arises, as rodent incisors do not grow — no support
3. The incisors cease to grow and are gradually replaced by additional molars from behind — no support
4. The incisors continue to grow unchecked and may curl, impeding feeding — ✓ 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

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