The big biology quiz, part 4: everything from lessons 301 to 399

Tests: 5 of 12 right · Exam: 2 of 4 right · Kind: ★★ · Understood: 12 of 16 · Run: 2026-10-18, commit f3c23ea72

Lesson 400 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 ✓

«my brother says spiders are insects cos they're creepy crawlies» What is the best correction?

1. Spiders are tiny crabs — no support
2. Spiders have eight legs, insects have six, so spiders are not insects — ← Mova's choice · ✓ the right answer · score 9
3. Spiders are insects without wings — score 6
4. Right, all crawling things are insects, whatever number of legs they have — score 6

Why: It took the question to ask what it is done to. It chose option 2 with score 9, against 6 for the next best. Its support: lesson 38, line 1: «Spiders are not insects: they are arachnids, with eight legs, a body in only two parts, no feelers, no wings, and usually eight eyes.», reached through the remembered sentence the question matched. What matched: the same light verb (be, have, do, get, go) (+6); it fills the role the question asks for (+2); the same doer «spiders» (+1). · the question and its options parsed, with trees and pragmatics

Test 2 · ★★ · wrong ✗

Count them: a beetle and a spider sit on a leaf. How many legs together?

1. 12 — ← Mova's choice · no support
2. 18 — no support
3. 14 — ✓ the right answer · 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 3 · ★★ · wrong ✗

«baby teeth, grown-up teeth, whatever, how many more do you get» How many more grown-up teeth than baby teeth in full sets?

1. 8 — no support
2. 20 — ← Mova's choice · score 3
3. 10 — no support
4. 12 — ✓ the right answer · no support

Why: It took the question to ask what it is done to. It chose option 2 with score 3, the only option with support. Its support: lesson 400, line 8: «A full set of grown-up teeth is 32 and a full set of baby teeth is 20; the last four grown-up teeth, the wisdom teeth, come in late, and some people never get…», reached through the same lesson line as the sentence the question matched. What matched: the number the lesson gave for it (+3); it fills the role the question asks for (+2); the same thing acted on «20» (+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

Test 4 · ★★ · wrong ✗

Count them: 3 owls perch on a branch. How many toes in all?

1. 18 — ← Mova's choice · no support
2. 30 — no support
3. 12 — no support
4. 24 — ✓ 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 5 · ★★ · right ✓

Why do you think the longest and strongest bone is in your leg?

1. It carries your whole weight when you stand, walk and jump — ← Mova's choice · ✓ the right answer · score 3
2. Arms are too short to hold long bones — score 3
3. Legs need to be long so that people look tall — score 2
4. Bones always grow longest in the part of the body where it is warmest — score 2

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 3, tied with another option at 3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 400, line 3: «Bodies are built for their lives: an owl swings one toe back to grip struggling prey, a dolphin sleeps with half its brain so it can keep coming up to breathe,…», reached through the option's own match among the sentences about the question's things. What matched: the same action «carry» (+2); the same thing acted on «weight» (+1). · the question and its options parsed, with trees and pragmatics

Test 6 · ★★ · wrong ✗

«it's October, where'd the stork go, did it die» What is the best answer?

1. It flew to Africa for the winter and should return in spring — ✓ the right answer · score -1
2. Storks sleep inside the warm chimneys all winter long — score 1
3. Storks turn into geese in autumn — no support
4. Storks hide under the ice of the ponds — ← Mova's choice · score 4

Why: It took the question to ask where. It chose option 4 with score 4, against 1 for the next best. Its support: lesson 375, line 17: «The shy black stork, a cousin, hides in deep forests near streams.», reached through the remembered sentence the question matched. What matched: the same action «hide» (+3); the same doer «shy black stork» (+1). The right option, 1, scored -1. · the question and its options parsed, with trees and pragmatics

Test 7 · ★★ · wrong ✗

Count them: a silkworm has 6 pointed true legs and 10 soft stumpy ones. How many legs on 2 silkworms?

1. 16 — ← Mova's choice · no support
2. 12 — no support
3. 20 — no support
4. 32 — ✓ 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 8 · ★★ · right ✓

Why are teeth found as fossils more often than other bones?

1. Animals used to have far more teeth than they had bones — no support
2. Teeth are very hard and last longer than other bones — ← Mova's choice · ✓ the right answer · score 3
3. Teeth float to the surface — no support
4. Teeth were buried on purpose — no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 3, the only option with support. Its support: lesson 400, line 14: «Gigantopithecus was a giant ape from southern China known mostly from teeth, which are very hard and last longer than other bones, first found sold as dragon t…», reached through the option's own match among the sentences about the question's things. What matched: the same action «last» (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics

Test 9 · ★★ · wrong ✗

What would happen if a dolphin fell fully asleep like a person, with its whole brain at once?

1. It could forget to come up for air and drown — ✓ the right answer · score -2
2. It would sink and breathe water — ← Mova's choice · score 1
3. It would sleep better than ever and wake up full of energy — score 1
4. Nothing, dolphins can breathe under water — score 1

Why: It took the question to ask what happens next. It chose option 2 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 400, line 15: «A dolphin sleeps with half its brain at a time and keeps coming up to breathe, with one eye open controlled by the awake half; ducks at the edge of a sleeping…», reached through the option's own match among the sentences about the question's things. What matched: the same action «breathe» (+1). The right option, 1, scored -2. · the question and its options parsed, with trees and pragmatics

Test 10 · ★★ · right ✓

In Tom and Jerry, Tom is flattened by a piano and pops back to shape. What is true of a real cat?

1. A real cat would be badly hurt and could not bounce back — ← Mova's choice · ✓ the right answer · score 5
2. Real cats are never hurt by falls — score -1
3. Real cats bounce back like rubber — score 0
4. Real cats can talk to the piano player — score 0

Why: It took the question to ask which statement is true. It chose option 1 with score 5, against 0 for the next best. Its support: lesson 119, line 15: «Pet cats hunt birds, mice, voles, lizards and insects, and in places like Australia and on islands cats have badly harmed small wild animals; a bright collar o…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «small wild animals» (+2); the same property (+2); a different action (counts against) (+1). · the question and its options parsed, with trees and pragmatics

Test 11 · ★★ · right ✓

«a friend ate some shiny black berries from the park, should we just not tell anyone?» What is the right thing to do?

1. Give the friend more berries to compare — no support
2. Tell a grown-up straight away — ← Mova's choice · ✓ the right answer · score 4
3. Keep it secret so nobody is cross — no support
4. Wait until tomorrow to see what happens — no support

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 392, line 4: «So there is one golden rule: never eat any wild berry, leaf, seed or mushroom unless a grown-up who really knows plants says it is safe. And if a little child…», reached through the same lesson line as the sentence the question matched. What matched: the same action «tell» (+4). · the question and its options parsed, with trees and pragmatics

Test 12 · ★★ · wrong ✗

Which animal sleeps standing up much of the time?

1. A pet cat — ← Mova's choice · score 6
2. A horse — ✓ the right answer · score 6
3. A dolphin — no support
4. A fruit bat — no support

Why: It took the question to ask who or what does it. 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 390, line 2: «Every animal sleeps in a way that fits its life. Ducks at the ends of a row keep the outward eye open, frigatebirds nap for seconds while gliding over the ocea…», reached through the same lesson line as the sentence the question matched. What matched: the same action «sleep» (+3); it fills the role the question asks for (+2); the same doer «animal» (+1). The right option, 2, scored 6. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

It is given that each insect possesses six legs. Ascertain the aggregate number of legs belonging to one beetle, one ant and one bee.

1. Twenty-four — ← Mova's choice · no support
2. Eighteen — ✓ the right answer · no support
3. Twelve — no support
4. Nine — 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 2 · formal language · right ✓

Select the response consistent with the established facts concerning the distinction between baleen whales and toothed whales.

1. Baleen whales strain small food from the water and possess two blowholes, whereas toothed whales possess one — ← Mova's choice · ✓ the right answer · score 5
2. Toothed whales possess two blowholes, whereas baleen whales possess one, and both groups consume large prey — score 3
3. Baleen whales consume large prey with their teeth — score 4
4. Both groups possess teeth and a single blowhole — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 5, against 4 for the next best. Its support: lesson 400, line 7: «The sperm whale and the orca have teeth, while the blue whale and the humpback have baleen plates for straining small food from the water; baleen whales have t…», reached through the option's own match among the sentences about the question's things. What matched: the same place «water» (+3); the same thing acted on «small food» (+2); the same doer «blue whale» (+1). Against it: the same action «strain» (-1). · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · wrong ✗

Identify the bone of the human body which is of the greatest length.

1. The smallest bone of the ear — ← Mova's choice · score 5
2. The femur, or thigh bone — ✓ the right answer · no support
3. The bone of the upper arm — no support
4. The spinal column — no support

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 360, line 10: «Joints come in kinds: hinge joints in the elbow and knee, ball-and-socket joints in the shoulder and hip, a pivot joint at the top of the neck for shaking the…», reached through the option's own match among the sentences about the question's things. What matched: the same place «small bones» (+3); the same property (+2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · right ✓

Which of the following statements most accurately characterises the manner in which a dolphin sleeps?

1. It does not sleep at any time — score 5
2. It sleeps with one half of its brain at a time, rising periodically to breathe — ← Mova's choice · ✓ the right answer · score 10
3. It sleeps continuously upon the floor of the sea — score 5
4. It sleeps upon the shore during the hours of darkness — score 5

Why: It took the question to ask who or what does it. It chose option 2 with score 10, against 5 for the next best. Its support: lesson 55, line 9: «Dolphins sleep with half their brain at a time and one eye open, so they can still come up to breathe and watch for danger.», reached through a sentence linked to the one the question matched. What matched: the same action «come up» (+5); it fills the role the question asks for (+2); its «because» matches the remembered cause (+2); the same doer «dolphins» (+1). · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/400-the-big-biology-quiz-part-4-everything-from-lessons-301-to-399/