---
title: Insects: butterflies, beetles, flies, mosquitoes, grasshoppers — how Mova does on the tests · Biology
description: Lesson 37 of the biology course of Mova's primary school: 7 of 12 tests right, exam 1 of 4, every question with the options, the student's choice, the right answer and why it chose.
---

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# Insects: butterflies, beetles, flies, mosquitoes, grasshoppers

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**Tests:** 7 of 12 right · **Exam:** 1 of 4 right · **Kind:** ★ · **Understood:** 10 of 16 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 37 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/).

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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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/).

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### Test 1 · ★ · right ✓ {#t1}

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In a cartoon a caterpillar just grows wings while still being a caterpillar. What really happens?

- **1.** It turns into a bird — score 3
- **2.** It eats wings off leaves — no support
- **3.** It forms a chrysalis, where its body is rebuilt into a butterfly — **← Mova's choice** · **✓ the right answer** · score 6
- **4.** It borrows wings from a moth — no support

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**Why:** It took the question to ask which statement is true. It chose option 3 with score 6, against 3 for the next best. Its support: lesson 37, line 1: «A green caterpillar hangs upside down, turns into a chrysalis, and inside much of its body melts into a kind of soup that is rebuilt into a butterfly: a body f…», reached through the same lesson line as the sentence the question matched. What matched: the same action «rebuild» (+5); the same circumstance (+2). Against it: a different thing acted on (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t1/)

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### Test 2 · ★ · right ✓ {#t2}

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my cousin says the monarchs in Mexico remember the trees from last year. right?

- **1.** No, the ones arriving have never been there before — **← Mova's choice** · **✓ the right answer** · no support
- **2.** Yes, they come back every year — no support
- **3.** Yes, their mothers come with them and show them the way to the trees — no support
- **4.** No, monarchs never go to Mexico — 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t2/)

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### Test 3 · ★ · wrong ✗ {#t3}

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What would happen if you rubbed all the scales off a butterfly's wing?

- **1.** It would grow a full set of new scales within a minute or two — no support
- **2.** It would fly faster — **← Mova's choice** · score 2
- **3.** Nothing, the scales are just dirt — no support
- **4.** It would lose its colours and patterns — **✓ the right answer** · no support

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**Why:** It took the question to ask what happens next. It chose option 2 with score 2, the only option with support. Its support: lesson 35, line 2: «The penguin's wings became flippers, the ostrich's legs became racing legs with two toes, and the hummingbird's wings beat so fast it can hover and even fly ba…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «wings» (+2); the same property (+1). Against it: a different action (counts against) (-1). The right option, 4, 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t3/)

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### Test 4 · ★ · wrong ✗ {#t4}

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The blue morpho of South America looks bright blue. Where does its blue come from?

- **1.** Blue blood showing through its thin wings — **← Mova's choice** · no support
- **2.** The shape of its scales bouncing light — **✓ the right answer** · no support
- **3.** The blue sky reflecting off its shiny body — no support
- **4.** Blue colour it gets from eating blue berries — 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t4/)

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### Test 5 · ★ · right ✓ {#t5}

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A mosquito keeps finding you in the dark tent. How?

- **1.** It hears your heartbeat — no support
- **2.** It follows the light from your phone or your torch across the tent — no support
- **3.** It sees you with night vision — no support
- **4.** It senses the carbon dioxide in your breath, your warmth and smell — **← Mova's choice** · **✓ the right answer** · score 2

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**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 37, line 14: «Only female mosquitoes bite, to get protein for their eggs; the itch is your body reacting to the mosquito's spit, and they find people in the dark by sensing…», reached through a sentence linked to the one the question matched. What matched: the same action «sense» (+2); the same place «breath» (+2). Against it: a different doer (counts against) (-1); a different thing acted on (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t5/)

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### Test 6 · ★ · wrong ✗ {#t6}

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Which animal kills the most people each year?

- **1.** The lion — score 4
- **2.** The crocodile, because it hides in rivers — score 7
- **3.** The mosquito, because some carry malaria — **✓ the right answer** · score 3
- **4.** The shark — **← Mova's choice** · score 13

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**Why:** It took the question to ask who or what does it. It chose option 4 with score 13, against 7 for the next best. Its support: lesson 28, line 4: «Films like Jaws show sharks hunting people; in truth, sharks kill only a handful of people a year, usually by mistaking a swimmer for a seal, while people kill…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+5); the same action «kill» (+3); the same doer «sharks» (+3); the same property (+2). 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t6/)

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### Test 7 · ★ · right ✓ {#t7}

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shut up, flies dont have taste, they just land on stuff. who's right?

- **1.** Flies have no taste at all — no support
- **2.** Flies taste with their wings — score 10
- **3.** Flies taste with their feet as they land — **← Mova's choice** · **✓ the right answer** · score 12
- **4.** Flies taste only with their big eyes as they land on things — score 10

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**Why:** It took the question to ask which statement is true. It chose option 3 with score 12, against 10 for the next best. Its support: lesson 37, line 2: «Butterflies and flies taste with their feet, so a red admiral landing on a rotting plum is tasting it as it lands.», reached through the same lesson line as the sentence the question matched. What matched: the same action «taste» (+5); the same doer «butterflies» (+5); the same circumstance (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t7/)

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### Test 8 · ★ · right ✓ {#t8}

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Why is it so hard to swat a fly?

- **1.** Its eyes see movement very fast — **← Mova's choice** · **✓ the right answer** · no support
- **2.** It can turn invisible for a moment — no support
- **3.** It can hear your thoughts before you move — no support
- **4.** It has extra eyes on its feet and wings — no support

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**Why:** Nothing it remembers matched the question, 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t8/)

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### Test 9 · ★ · right ✓ {#t9}

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In a game, a glow-worm is a wiggly worm that lights up. What would you correct?

- **1.** It is a snake that glows — no support
- **2.** Only male glow-worms glow — no support
- **3.** A glow-worm is a beetle, and the glowing one is the wingless female — **← Mova's choice** · **✓ the right answer** · score 8
- **4.** It is a worm that lights up with electricity — score -4

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**Why:** It took the question to ask what it is done to. It chose option 3 with score 8, against -4 for the next best. Its support: lesson 37, line 18: «The glow-worm is a beetle: the wingless female makes a cold green light in her tail with a chemical reaction, which wastes almost no energy as heat, to show fl…», reached through the remembered sentence the question matched. What matched: the same doer «glow worm» (+6); the same light verb (be, have, do, get, go) (+2); it fills the role the question asks for (+1). Against it: the same thing acted on «beetle» (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t9/)

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### Test 10 · ★ · right ✓ {#t10}

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Why does the glow-worm's light not get hot like a bulb?

- **1.** It only glows for a second — score 5
- **2.** Light from a chemical reaction wastes almost no energy as heat — **← Mova's choice** · **✓ the right answer** · score 6
- **3.** It keeps the light in ice — score 2
- **4.** It is far too small to get hot like a bulb — score 3

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**Why:** It took the question to ask why something happens (its cause). It chose option 2 with score 6, against 5 for the next best. Its support: lesson 37, line 18: «The glow-worm is a beetle: the wingless female makes a cold green light in her tail with a chemical reaction, which wastes almost no energy as heat, to show fl…», reached through the same lesson line as the sentence the question matched. What matched: the same action «waste» (+2); the same thing acted on «energy» (+2); the same circumstance (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t10/)

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### Test 11 · ★ · wrong ✗ {#t11}

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What would happen if a swarm of desert locusts landed on a farm?

- **1.** It would pollinate the crops and make them grow better — **← Mova's choice** · no support
- **2.** It would only eat the weeds — no support
- **3.** It could eat the crops in a very short time — **✓ the right answer** · no support
- **4.** It would help the crops grow — 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t11/)

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### Test 12 · ★ · wrong ✗ {#t12}

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A cricket's song is coming from the grass. Where are its ears?

- **1.** On its front legs, below the knees — **✓ the right answer** · score 6
- **2.** On its wings — score 4
- **3.** It has no ears at all — no support
- **4.** On top of its head — **← Mova's choice** · score 11

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**Why:** It took the question to ask where. It chose option 4 with score 11, against 6 for the next best. Its support: lesson 29, line 8: «A crocodile's eyes, ears and nostrils are on top of its head, and a clear third eyelid protects its eyes under water like goggles.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+4); the same doer «eyes» (+3); the same place «top» (+2); the same light verb (be, have, do, get, go) (+2). The right option, 1, scored 6. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/37-butterflies-beetles-flies-mosquitoes-grasshoppers/t12/)

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

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Which of the following statements most accurately characterises the process within the chrysalis?

- **1.** Much of the larval body is broken down and reconstructed into the adult form — **✓ the right answer** · no support
- **2.** The caterpillar merely sleeps until wings emerge — **← Mova's choice** · score 8
- **3.** The caterpillar is replaced by a different animal — no support
- **4.** The caterpillar lays an egg which, in due course, develops into the winged butterfly — score 8

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**Why:** It took the question to ask who or what does it. It chose option 2 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 37, line 1: «A green caterpillar hangs upside down, turns into a chrysalis, and inside much of its body melts into a kind of soup that is rebuilt into a butterfly: a body f…», reached through a sentence linked to the one the question matched. What matched: it fills the role the question asks for (+5); the same doer «green caterpillar» (+4). Against it: a different action (counts against) (-1). The right option, 1, 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/e1/)

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### Exam question 2 · formal language · right ✓ {#e2}

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Identify the principal reason for which the mosquito is accounted the deadliest animal to humankind.

- **1.** It contaminates the drinking water supplies — no support
- **2.** It attacks in exceedingly large swarms — no support
- **3.** Its bite is directly and highly venomous — no support
- **4.** Certain species transmit malaria — **← Mova's choice** · **✓ the right answer** · score 2

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**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 37, line 15: «Some mosquitoes carry malaria, which kills about 600,000 people a year, mostly young children in Africa, so mosquitoes are the deadliest animals to people.», 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 «malaria» (+1). Against it: a different doer (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/37-butterflies-beetles-flies-mosquitoes-grasshoppers/e2/)

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### Exam question 3 · formal language · wrong ✗ {#e3}

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Ascertain which sex of mosquito feeds upon blood.

- **1.** The male exclusively — **← Mova's choice** · no support
- **2.** Both sexes, equally — no support
- **3.** The female exclusively — **✓ the right answer** · no support
- **4.** Neither sex — no support

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**Why:** Nothing it remembers matched the question, 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/e3/)

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### Exam question 4 · formal language · wrong ✗ {#e4}

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It is given that a ladybird prepares for flight. Identify the structures it raises.

- **1.** The abdomen — **← Mova's choice** · no support
- **2.** The hardened forewings, or elytra — **✓ the right answer** · no support
- **3.** The hind legs and the feet — no support
- **4.** The antennae — 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/37-butterflies-beetles-flies-mosquitoes-grasshoppers/e4/)

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- ← previous: [36. Insects: six legs, three parts; ants, bees and w…](https://md.mova.elamur.ai/free/en/school-run/biology/36-insects-six-legs-ants-bees-and-wasps/)
- next →: [38. Spiders, scorpions and other eight-legged creatu…](https://md.mova.elamur.ai/free/en/school-run/biology/38-spiders-scorpions-and-eight-legged-creatures/)
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