---
title: Identify the organ by means of which a snake principally gathers sce… — Snakes and lizards · tree and pragmatics
description: Identify the organ by means of which a snake principally gathers scents from its surroundings. Exam question 1 of lesson 30 «Snakes and lizards» 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 right.
---

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# Exam question 1 · Snakes and lizards

<!-- .ven lang=en -->
Identify the organ by means of which a snake principally gathers scents from its surroundings.

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 2 · right ✓ · **Who acts:** you, snake · **What happens:** identify, mean, gather · **To what, where:** organ, scents, surroundings · **Speech:** someone speaks here

<!-- .vabout -->
This is exam question 1 of lesson 30 «Snakes and lizards» of the biology course of Mova's primary school, asked in stiff, formal language. 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/30-snakes-and-lizards/#e1).

## The question {#question}

```conllu
# sent_id = question:biology:30-snakes-and-lizards:e1:1
# text = Identify the organ by means of which a snake principally gathers scents from its surroundings.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	organ	organ	NOUN	NN	Number=Sing	1	obj	_	_
4	by	by	ADP	IN	_	5	case	_	_
5	means	mean	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	parataxis	_	_
6	of	of	ADP	IN	_	7	case	_	_
7	which	which	PRON	WDT	PronType=Rel	11	obl	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	snake	snake	NOUN	NN	Number=Sing	11	nsubj	_	_
10	principally	principally	ADV	RB	_	11	advmod	_	_
11	gathers	gather	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	ccomp	_	_
12	scents	scent	NOUN	NNS	Number=Plur	11	obj	_	_
13	from	from	ADP	IN	_	15	case	_	_
14	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	15	nmod:poss	_	_
15	surroundings	surroundings	NOUN	NNS	Number=Ptan	12	nmod	_	SpaceAfter=No
16	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the organ |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent organ=Theme |
| 2 | **mean** | present |  |  |  |  |  |  | vn intend-61.2-1 «NP V S»: agent=Agent clause=Topic |
| 3 | **gather** | present | a snake | scents |  | snake's surroundings |  | principally *property* | vn deduce-97.2 «NP V NP PP.source»: agent=Agent scent=Theme from surroundings=Source |

<!-- .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 {#o1}

<!-- .ven lang=en -->
The eyes

```conllu
# sent_id = question:biology:30-snakes-and-lizards:e1:o1:1
# text = The eyes
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	eyes	eye	NOUN	NNS	Number=Plur	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 2 · ← Mova's choice · ✓ the right answer {#o2}

<!-- .ven lang=en -->
The forked tongue, conveying particles to an organ in the palate

```conllu
# sent_id = question:biology:30-snakes-and-lizards:e1:o2:1
# text = The forked tongue, conveying particles to an organ in the palate
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	forked	fork	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	amod	_	_
3	tongue	tongue	NOUN	NN	Number=Sing	0	root	_	SpaceAfter=No
4	,	,	PUNCT	,	_	5	punct	_	_
5	conveying	convey	VERB	VBG	VerbForm=Ger	3	acl	_	_
6	particles	particle	NOUN	NNS	Number=Plur	5	obj	_	_
7	to	to	ADP	IN	_	9	case	_	_
8	an	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	organ	organ	NOUN	NN	Number=Sing	5	obl	_	_
10	in	in	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	palate	palate	NOUN	NN	Number=Sing	9	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fork** | participle |  |  |  |  |  |  | vn pocket-9.10 «NP V NP.theme»: agent=Agent |
| 2 | **convey** | gerund | the forked tongue *not said here* | particles | a organ in the palate |  |  |  | vn say-37.7-1-1 «NP V NP PP.recipient»: agent=Agent particle=Topic to organ=Recipient |

### Option 3 {#o3}

<!-- .ven lang=en -->
The nostrils alone

```conllu
# sent_id = question:biology:30-snakes-and-lizards:e1:o3:1
# text = The nostrils alone
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	nostrils	nostril	NOUN	NNS	Number=Plur	0	root	_	_
3	alone	alone	ADV	RB	_	2	advmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
The scales of the belly

```conllu
# sent_id = question:biology:30-snakes-and-lizards:e1:o4:1
# text = The scales of the belly
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	scales	scale	NOUN	NNS	Number=Plur	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	belly	belly	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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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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