---
title: Clever primates: tool-using chimps, Kanzi the bonobo and Ayumu's mem… — how Mova does on the tests · Biology
description: Lesson 387 of the biology course of Mova's primary school: 6 of 11 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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# Clever primates: tool-using chimps, Kanzi the bonobo and Ayumu's memory

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**Tests:** 6 of 11 right · **Exam:** 2 of 4 right · **Kind:** ★ · **Understood:** 13 of 15 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 387 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/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/).

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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/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/).

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### Test 1 · ★ · right ✓ {#t1}

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«chimps just find sticks, that ain't making tools» What is right?

- **1.** They strip the leaves first, so they shape a tool — **← Mova's choice** · **✓ the right answer** · score 6
- **2.** Only people make tools — score 3
- **3.** Chimps cannot hold sticks — score 2
- **4.** Yes, they never change the stick in any way at all — score 2

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 6, against 3 for the next best. Its support: lesson 284, line 2: «Jane Goodall sat quietly in a Tanzanian forest from 1960 until the chimpanzees trusted her, and she saw something nobody believed: a chimp stripping leaves fro…», reached through a sentence linked to the one the question matched. What matched: the same action «strip» (+3); the same doer «chimp» (+2); the same thing acted on «leaves» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t1/)

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### Test 2 · ★ · right ✓ {#t2}

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Count them: Curious George is called a monkey but has no tail. A real chimp has how many tails?

- **1.** One, like all monkeys — no support
- **2.** Two — no support
- **3.** None, apes have no tails — **← Mova's choice** · **✓ the right answer** · score 12
- **4.** One, but very short and curly — no support

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**Why:** It took the question to ask what it is done to. It chose option 3 with score 12, the only option with support. Its support: lesson 387, line 16: «Apes have no tails, while most monkeys have them.», reached through the remembered sentence the question matched. What matched: the same light verb (be, have, do, get, go) (+5); the same doer «apes» (+3); it fills the role the question asks for (+3); the same thing acted on «tails» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t2/)

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### Test 3 · ★ · wrong ✗ {#t3}

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Count them: 3 chimps. How many fingers and toes in all?

- **1.** Twenty — **← Mova's choice** · no support
- **2.** Forty-eight — no support
- **3.** Thirty — no support
- **4.** Sixty — **✓ the right answer** · 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/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t3/)

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### Test 4 · ★ · wrong ✗ {#t4}

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In The Jungle Book King Louie is an orangutan king in India. What is right about real orangutans?

- **1.** They cannot climb — score -2
- **2.** They live in the forests of Borneo and Sumatra, not India — **✓ the right answer** · score 1
- **3.** They live in deserts — score 1
- **4.** They rule all the monkeys of India from an old ruined temple — **← Mova's choice** · score 2

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**Why:** It took the question to ask which statement is true. It chose option 4 with score 2, against 1 for the next best. Its support: lesson 85, line 16: «Like all apes, orangutans, gibbons and bonobos have no tails.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «tails» (+2). The right option, 2, scored 1. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t4/)

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### Test 5 · ★ · wrong ✗ {#t5}

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What would happen if a young chimp grew up with no adults to watch?

- **1.** It would find it much harder to learn termite fishing and nut cracking — **✓ the right answer** · score 7
- **2.** It would teach the adults — score 7
- **3.** It would learn every trick faster on its own, because nobody would get in its way — **← Mova's choice** · score 10
- **4.** It would know every trick anyway — score 4

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**Why:** It took the question to ask what happens next. It chose option 3 with score 10, against 7 for the next best. Its support: lesson 387, line 2: «Young chimps learn tricks like this by watching their mothers for years, the way you learned to tie your laces by watching someone.», reached through what followed the sentence the question matched. What matched: the same action «learn» (+6); the same thing acted on «tricks» (+3); the same doer «young chimps» (+1). The right option, 1, scored 7. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t5/)

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### Test 6 · ★ · right ✓ {#t6}

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«my mate says the chimp beat students at memory, so chimps are cleverer than people» What is the fair view?

- **1.** Ayumu did better in one quick-memory test; that is argued and is not all of cleverness — **← Mova's choice** · **✓ the right answer** · score 4
- **2.** The students were asleep — no support
- **3.** Yes, chimps are cleverer than people at everything, from maths to building houses and cars — score 3
- **4.** No, Ayumu failed the test — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 4, against 3 for the next best. Its support: lesson 85, line 13: «Some zoos let apes play memory games on touch screens, and in a famous test young chimps remembered flashing numbers faster than university students.», reached through the option's own match among the sentences about the question's things. What matched: the same place «famous test» (+4). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t6/)

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### Test 7 · ★ · right ✓ {#t7}

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«why'd a monkey in Brazil and a chimp in Africa both use stones, did they copy?» What is right?

- **1.** They are the same animal, only living in two places far apart — score 1
- **2.** They worked it out separately, because stones are good for cracking hard nuts — **← Mova's choice** · **✓ the right answer** · score 6
- **3.** The monkeys taught the chimps by phone — score 2
- **4.** The chimps sailed to Brazil — no support

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**Why:** It took the question to ask why something happens (its cause). It chose option 2 with score 6, against 2 for the next best. Its support: lesson 387, line 13: «Bearded capuchin monkeys in Brazil crack palm nuts with stones nearly as heavy as themselves, and they choose and carry the best stones.», reached through the same lesson line as the sentence the question matched. What matched: the same action «crack» (+6); the same thing acted on «palm nuts» (+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/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t7/)

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### Test 8 · ★ · right ✓ {#t8}

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«Koko knew sign language so she talked like us, done» What is the careful view?

- **1.** She knew nothing at all and only copied her keeper's hands for food — no support
- **2.** She spoke English out loud — no support
- **3.** She wrote books — no support
- **4.** She used many signs, but how much she understood is still argued — **← Mova's choice** · **✓ the right answer** · score 3

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**Why:** It took the question to ask which statement is true. It chose option 4 with score 3, the only option with support. Its support: lesson 387, line 17: «Koko the gorilla used many signs, but scientists still argue how much she understood, so careful tests are needed.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «many signs» (+2); the same action «use» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t8/)

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### Test 9 · ★ · right ✓ {#t9}

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«why don't my big toes grab stuff like a chimp's» What is the best answer?

- **1.** Chimps have no big toes — no support
- **2.** Shoes squashed them — no support
- **3.** Our feet are made for walking, theirs for climbing and gripping — **← Mova's choice** · **✓ the right answer** · score 1
- **4.** We forgot how to use them because we stopped climbing trees as babies — no support

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**Why:** It took the question to ask why something happens (its cause). It chose option 3 with score 1, the only option with support. Its support: lesson 303, line 14: «Parrots have two toes pointing forward and two back on each foot, so they can grip branches and hold food like a hand; many parrots prefer their left foot, stu…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «toes» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t9/)

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### Test 10 · ★ · wrong ✗ {#t10}

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How could you test whether an ape really understands a word?

- **1.** Count how often it smiles — no support
- **2.** Have someone who does not know the answer ask in new situations — **✓ the right answer** · no support
- **3.** Ask the ape's own keeper what it means, since the keeper knows the ape best — **← Mova's choice** · score 7
- **4.** Show it the answer first — no support

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**Why:** It took the question to ask what something is like. It chose option 3 with score 7, the only option with support. Its support: lesson 16, line 3: «Apes use tools and know themselves: a chimp fishes termites out of a mound with a grass stem, an orangutan weaves a fresh leafy bed every night, and chimps in…», reached through the option's own match among the sentences about the question's things. What matched: the same action «know» (+5); the same thing acted on «apes» (+2). The right option, 2, 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/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t10/)

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### Test 11 · ★ · wrong ✗ {#t11}

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«snow monkeys washing potatoes, that's just instinct» What do scientists say?

- **1.** Keepers trained each one — score 2
- **2.** It only happened in a film — no support
- **3.** It was a new habit copied from one young female, a piece of culture — **✓ the right answer** · score 3
- **4.** All monkeys are born washing food, just as they are born knowing how to climb — **← Mova's choice** · score 9

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**Why:** It took the question to ask what it is done to. It chose option 4 with score 9, against 3 for the next best. Its support: lesson 387, line 3: «Different chimp groups use different tools, and snow monkeys in Japan copied one young female who washed sandy sweet potatoes. A habit learned from others and…», reached through the remembered sentence the question matched. What matched: the same action «wash» (+5); it fills the role the question asks for (+3); the same thing acted on «sandy sweet potatoes» (+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/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/t11/)

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### Exam question 1 · formal language · wrong ✗ {#e1}

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Identify the principal reason for which termite fishing by chimpanzees is regarded as tool manufacture.

- **1.** The termites themselves construct the implement for the chimpanzee — **← Mova's choice** · score 8
- **2.** The stem is employed without any alteration — no support
- **3.** The behaviour is confined to captive animals — no support
- **4.** The animal modifies the stem by stripping its leaves prior to use — **✓ the right answer** · score 3

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 8, against 3 for the next best. Its support: lesson 84, line 8: «Wild chimpanzees make tools: they fish for termites with stripped twigs, crack nuts with stones and use leaves as sponges.», reached through the same lesson line as the sentence the question matched. What matched: the same action «make» (+4); the same circumstance (+3); a different doer (counts against) (+1). The right option, 4, scored 3. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/e1/)

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

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Ascertain the aggregate number of fingers and toes possessed by a single chimpanzee.

- **1.** Sixteen — **← Mova's choice** · no support
- **2.** Eighteen — no support
- **3.** Ten — no support
- **4.** Twenty — **✓ the right answer** · 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/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/e2/)

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### Exam question 3 · formal language · right ✓ {#e3}

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Select the response consistent with the established facts concerning the washing of sweet potatoes by Japanese macaques.

- **1.** It is an innate behaviour of all monkeys — no support
- **2.** It was instilled in each individual by human keepers — no support
- **3.** It was observed exclusively in a laboratory — no support
- **4.** The habit began with one young female and spread through the troop by imitation — **← Mova's choice** · **✓ the right answer** · score 5

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**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 387, line 12: «In Japan a young female macaque began washing sandy sweet potatoes in water, and the habit spread through her troop by copying.», reached through the same lesson line as the sentence the question matched. What matched: the same action «spread» (+4); the same place «troop» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/e3/)

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

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Which of the following statements most accurately characterises the scientific assessment of signing by the gorilla Koko?

- **1.** She is agreed to have understood no sign whatsoever — no support
- **2.** She is agreed by all scientists to have understood every sign without exception — score 3
- **3.** Her use of signs is acknowledged, but the extent of her comprehension remains disputed — **← Mova's choice** · **✓ the right answer** · score 5
- **4.** She has been conclusively demonstrated to speak aloud — no support

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**Why:** It took the question to ask who or what does it. It chose option 3 with score 5, against 3 for the next best. Its support: lesson 387, line 17: «Koko the gorilla used many signs, but scientists still argue how much she understood, so careful tests are needed.», reached through the remembered sentence the question matched. What matched: a different action (counts against) (+3); it fills the role the question asks for (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/387-clever-primates-tool-using-chimps-kanzi-the-bonobo-and-ayumu-s-memory/e4/)

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