---
title: Why is a bladderwort trap like a vacuum cleaner? — Plants deeper: carnivorous plants that… · tree and pragmatics
description: Why is a bladderwort trap like a vacuum cleaner? Test 11 of lesson 254 «Plants deeper: carnivorous plants that count, slip and suck» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 11 · Plants deeper: carnivorous plants that count, slip and suck

<!-- .ven lang=en -->
Why is a bladderwort trap like a vacuum cleaner?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **What happens:** be · **To what, where:** bladderwort trap

<!-- .vabout -->
This is test 11 of lesson 254 «Plants deeper: carnivorous plants that count, slip and suck» of the biology course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/biology/254-plants-deeper-carnivorous-plants-that-count-slip-and-suck/#t11).

## The question {#question}

```conllu
# sent_id = question:biology:254-plants-deeper-carnivorous-plants-that-count-slip-and-suck:t11:1
# text = Why is a bladderwort trap like a vacuum cleaner?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	bladderwort	bladderwort	NOUN	NN	Number=Sing	5	compound	_	_
5	trap	trap	NOUN	NN	Number=Sing	0	root	_	_
6	like	like	ADP	IN	_	9	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	vacuum	vacuum	NOUN	NN	Number=Sing	9	compound	_	_
9	cleaner	cleaner	NOUN	NN	Number=Sing	5	nmod	_	SpaceAfter=No
10	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present |  | a bladderwort trap |  |  |  | like a vacuum cleaner | tree rules |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
It blows insects away from the plant

```conllu
# sent_id = question:biology:254-plants-deeper-carnivorous-plants-that-count-slip-and-suck:t11:o1:1
# text = It blows insects away from the plant
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	blows	blow	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	insects	insect	NOUN	NNS	Number=Plur	2	obj	_	_
4	away	away	ADV	RB	_	2	advmod	_	_
5	from	from	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	plant	plant	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **blow** | present | It | insects |  |  |  | away *property* | vn split-23.2 «NP V NP apart»: agent=Agent insect=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
It makes a loud noise under the water to scare the prey towards it

```conllu
# sent_id = question:biology:254-plants-deeper-carnivorous-plants-that-count-slip-and-suck:t11:o2:1
# text = It makes a loud noise under the water to scare the prey towards it
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	loud	loud	ADJ	JJ	Degree=Pos	5	amod	_	_
5	noise	noise	NOUN	NN	Number=Sing	2	obj	_	_
6	under	under	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	water	water	NOUN	NN	Number=Sing	2	obl	_	_
9	to	to	PART	TO	_	10	mark	_	_
10	scare	scare	VERB	VB	VerbForm=Inf	2	advcl	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	prey	prey	NOUN	NN	Number=Sing	10	obj	_	_
13	towards	towards	ADP	IN	_	14	case	_	_
14	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	10	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | It | a loud noise |  | the water |  |  | vn build-26.1-1 «NP.material V NP»: agent=Material noise=Product |
| 2 | **scare** | to-infinitive |  | the prey |  |  |  | towards prey | vn amuse-31.1 «NP V NP»: agent=Stimulus prey=Experiencer |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
It lowers the pressure inside, then sucks prey in when the door opens

```conllu
# sent_id = question:biology:254-plants-deeper-carnivorous-plants-that-count-slip-and-suck:t11:o3:1
# text = It lowers the pressure inside, then sucks prey in when the door opens
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	lowers	lower	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	pressure	pressure	NOUN	NN	Number=Sing	2	obj	_	_
5	inside	inside	ADV	RB	_	2	advmod	_	SpaceAfter=No
6	,	,	PUNCT	,	_	8	punct	_	_
7	then	then	ADV	RB	PronType=Dem	8	advmod	_	_
8	sucks	suck	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
9	prey	prey	NOUN	NN	Number=Sing	8	obj	_	_
10	in	in	ADP	RP	_	8	compound:prt	_	_
11	when	when	SCONJ	WRB	_	14	mark	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	door	door	NOUN	NN	Number=Sing	14	nsubj	_	_
14	opens	open	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **lower** | present | It | the pressure |  |  |  | inside *property* | vn put\_direction-9.4 «NP V NP»: agent=Agent pressure=Theme |
| 2 | **suck in** | present |  | prey |  |  | then |  | vn wipe\_manner-10.4.1-1 «NP V NP.source»: agent=Agent prey=Source |
| 3 | **open** | present | the door |  |  |  |  |  | vn spatial\_configuration-47.6-1 «NP V»: agent=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
It runs on electricity from the pond

```conllu
# sent_id = question:biology:254-plants-deeper-carnivorous-plants-that-count-slip-and-suck:t11:o4:1
# text = It runs on electricity from the pond
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	runs	run	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	on	on	ADP	IN	_	4	case	_	_
4	electricity	electricity	NOUN	NN	Number=Sing	2	obl	_	_
5	from	from	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	pond	pond	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **run** | present | It |  |  | electricity |  | from the pond | vn run-51.3.2-2-1 «NP V PP.location»: agent=Theme on electricity=Trajectory |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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