---
title: Plants deeper: carnivorous plants that count, slip and suck — how Mova does on the tests · Biology
description: Lesson 254 of the biology course of Mova's primary school: 3 of 11 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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# Plants deeper: carnivorous plants that count, slip and suck

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**Tests:** 3 of 11 right · **Exam:** 1 of 4 right · **Kind:** plain · **Understood:** 8 of 15 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 254 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/).

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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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/).

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### Test 1 · right ✓ {#t1}

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«saw a cartoon plant swallow a whole man, that's real somewhere innit» What is right?

- **1.** No, but they do eat dogs and cats — no support
- **2.** No, no plant eats people; the biggest pitchers catch at most a frog, a lizard or a rare rat — **← Mova's choice** · **✓ the right answer** · score 6
- **3.** Yes, in the jungles of Madagascar, as explorers have reported — no support
- **4.** Yes, but only at night — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 6, the only option with support. Its support: lesson 203, line 15: «Living plants use up some fish waste, add oxygen in the light and give fish places to hide.», reached through the option's own match among the sentences about the question's things. What matched: the same action «use up» (+4); the same doer «living plants» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t1/)

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### Test 2 · wrong ✗ {#t2}

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In a video game a piranha plant pops out of a pipe and bites the hero. What is true of real carnivorous plants?

- **1.** They can bite, but only through thick gloves — **← Mova's choice** · no support
- **2.** They chew their food with tiny teeth — no support
- **3.** They hide in pipes and jump out at people — no support
- **4.** They catch small animals by traps and do not chase or bite anyone — **✓ 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t2/)

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### Test 3 · wrong ✗ {#t3}

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Count them: 3 flies are caught in a pitcher plant. How many legs went in?

- **1.** 9 — **← Mova's choice** · no support
- **2.** 12 — no support
- **3.** 18 — **✓ the right answer** · no support
- **4.** 24 — 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t3/)

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### Test 4 · wrong ✗ {#t4}

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What would happen if you watered a flytrap with tap water every day?

- **1.** It would stop needing insects — score 0
- **2.** Nothing at all, any water is the same — score -1
- **3.** Minerals in the tap water would slowly harm it — **✓ the right answer** · score -1
- **4.** It would grow twice as fast as before and flower sooner — **← Mova's choice** · score 1

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**Why:** It took the question to ask what happens next. It chose option 4 with score 1, against 0 for the next best. Its support: lesson 254, line 9: «Venus flytraps grow wild only in one small area of North and South Carolina in the USA.», reached through the option's own match among the sentences about the question's things. What matched: the same action «grow» (+1). The right option, 3, scored -1. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t4/)

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### Test 5 · right ✓ {#t5}

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«gave my flytrap a bit of burger, it's a meat eater so it'll love it» What is best?

- **1.** No, flytraps eat only vegetables — no support
- **2.** No, it cannot digest fat, and the trap may rot — **← Mova's choice** · **✓ the right answer** · score 5
- **3.** Yes, a burger is its perfect food, full of meat — no support
- **4.** Yes, but only if the burger is cooked — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 5, the only option with support. Its support: lesson 254, line 18: «A pet flytrap needs bright sun, wet soil, rainwater instead of tap water, whose minerals slowly harm it, a cold rest in winter, and never pieces of burger, who…», reached through the same lesson line as the sentence the question matched. What matched: the same action «digest» (+3); the same thing acted on «fat» (+3). 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t5/)

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### Test 6 · wrong ✗ {#t6}

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A man in the 1800s read in a newspaper about a tree in Madagascar that ate people. What was it really?

- **1.** A giant pitcher plant — score 3
- **2.** A real tree that is now extinct — **← Mova's choice** · score 4
- **3.** A pet tiger hiding in a tree — no support
- **4.** A made-up hoax story — **✓ the right answer** · no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 4, against 3 for the next best. Its support: lesson 186, line 6: «Pando in Utah is a group of aspen trees that are all one plant joined by the same roots, and it may be one of the heaviest living things on Earth.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «tree» (+2); the same thing acted on «one» (+1); the same light verb (be, have, do, get, go) (+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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t6/)

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### Test 7 · wrong ✗ {#t7}

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Mia blows gently on a flytrap trap once. What happens?

- **1.** Probably nothing, because it needs two trigger touches — **✓ the right answer** · score 1
- **2.** It dies straight away from the shock of being touched — **← Mova's choice** · score 4
- **3.** It snaps shut at once and starts to digest — score 3
- **4.** It starts digesting the air — no support

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**Why:** It took the question to ask what happens next. It chose option 2 with score 4, against 3 for the next best. Its support: lesson 254, line 3: «The Venus flytrap is a plant that counts. Inside its trap are tiny trigger hairs, and only when two of them are touched within about 20 seconds does it snap sh…», reached through what followed the sentence the question matched. What matched: the same action «touch» (+6). Against it: a different thing acted on (counts against) (-2). The right option, 1, scored 1. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t7/)

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### Test 8 · wrong ✗ {#t8}

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Why might a carnivorous plant help a bog plant more than a garden plant?

- **1.** Garden plants are too lazy to catch insects for food — **← Mova's choice** · score 6
- **2.** Bog soil has little nitrogen, and insects bring some in — **✓ the right answer** · no support
- **3.** Bog plants have no leaves for sunlight — score 5
- **4.** Insects only live near bogs — no support

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**Why:** It took the question to ask why something happens (its cause). It chose option 1 with score 6, against 5 for the next best. Its support: lesson 254, line 2: «These plants found a trick: they catch insects and digest them, the way you might take vitamins, while still making their main food from sunlight like any othe…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «insects» (+4); the same action «catch» (+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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t8/)

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### Test 9 · wrong ✗ {#t9}

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«darwin fed plants?? sounds made up» What is right?

- **1.** He fed them only bread and milk — no support
- **2.** It is a joke from an old cartoon about a hungry plant — no support
- **3.** It was his cat that fed them — **← Mova's choice** · score 1
- **4.** It is true; he tested sundews with bits of meat and hair — **✓ the right answer** · no support

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**Why:** It took the question to ask which statement is true. It chose option 3 with score 1, the only option with support. Its support: lesson 198, line 11: «Cats sometimes make a fast chattering or clicking sound at birds through a window; nobody knows for sure why, and ideas include frustration, a practice killing…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «cats» (+2); the same thing acted on «sound» (+1). Against it: a different action (counts against) (-2). 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t9/)

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### Test 10 · right ✓ {#t10}

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In winter a flytrap kept in a warm, bright room never rests. What is likely?

- **1.** It weakens, because it needs a cold winter rest — **← Mova's choice** · **✓ the right answer** · score 7
- **2.** It grows bigger than ever and flowers all through the winter — score 6
- **3.** It turns into a pitcher plant — score 6
- **4.** It starts catching mice — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 7, against 6 for the next best. Its support: lesson 254, line 18: «A pet flytrap needs bright sun, wet soil, rainwater instead of tap water, whose minerals slowly harm it, a cold rest in winter, and never pieces of burger, who…», reached through the option's own match among the sentences about the question's things. What matched: the same action «need» (+4); the same doer «pet flytrap» (+2); the same thing acted on «bright sun» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t10/)

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### Test 11 · wrong ✗ {#t11}

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Why is a bladderwort trap like a vacuum cleaner?

- **1.** It blows insects away from the plant — **← Mova's choice** · no support
- **2.** It makes a loud noise under the water to scare the prey towards it — no support
- **3.** It lowers the pressure inside, then sucks prey in when the door opens — **✓ the right answer** · no support
- **4.** It runs on electricity from the pond — 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/t11/)

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

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Identify the principal reason for which a Venus flytrap requires two stimuli of its trigger hairs prior to closure.

- **1.** The necessity of warming the trap by sunlight before any movement is possible — **← Mova's choice** · no support
- **2.** The provision of time for the prey to escape — no support
- **3.** The requirement to attract a second insect — no support
- **4.** The avoidance of wasteful closure upon raindrops and other non-living objects — **✓ 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/e1/)

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

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Select the response consistent with the established facts concerning the nutrition of carnivorous plants.

- **1.** They obtain their food solely from the mud of bogs — **← Mova's choice** · no support
- **2.** They derive all of their food exclusively from captured insects, being unable to make any themselves — no support
- **3.** They manufacture their principal food by photosynthesis and derive additional nutrients from captured insects — **✓ the right answer** · no support
- **4.** They are incapable of photosynthesis — 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/e2/)

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

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Which of the following statements most accurately characterises the reports of man-eating trees in Madagascar published during the nineteenth century?

- **1.** They were a hoax without foundation in fact — **← Mova's choice** · **✓ the right answer** · no support
- **2.** They described a species now extinct — no support
- **3.** They were accurate accounts of giant pitcher plants — no support
- **4.** They referred to a carnivorous fungus — 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/e3/)

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

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Ascertain the mechanism by which a bladderwort captures its prey.

- **1.** The drowning of insects in a lidded pitcher — **← Mova's choice** · no support
- **2.** The snapping closure of a hinged leaf upon contact — no support
- **3.** The adhesion of flies to sticky tentacles above the surface of the water — no support
- **4.** The rapid suction of water fleas into a low-pressure underwater bladder — **✓ 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/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/e4/)

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- ← previous: [253. Plants deeper: the oldest, tallest and strangest…](https://md.mova.elamur.ai/free/en/school-run/biology/253-plants-deeper-the-oldest-tallest-and-strangest-trees/)
- next →: [255. Plants deeper: poisonous and stinging plants and…](https://md.mova.elamur.ai/free/en/school-run/biology/255-plants-deeper-poisonous-and-stinging-plants-and-staying-safe/)
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