---
title: Ascertain the purpose served by the spreading of the hood in the cob… — Defences: venom in snakes, jellyfish,… · tree and pragmatics
description: Ascertain the purpose served by the spreading of the hood in the cobra. Exam question 4 of lesson 246 «Defences: venom in snakes, jellyfish, scorpions and the platypus» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's 
---

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# Exam question 4 · Defences: venom in snakes, jellyfish, scorpions and the pl…

<!-- .ven lang=en -->
Ascertain the purpose served by the spreading of the hood in the cobra.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 4 · wrong ✗ · **Who acts:** you · **What happens:** ascertain, serve, spread · **To what, where:** purpose, hood

<!-- .vabout -->
This is exam question 4 of lesson 246 «Defences: venom in snakes, jellyfish, scorpions and the platypus» 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/246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus/#e4).

## The question {#question}

```conllu
# sent_id = question:biology:246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus:e4:1
# text = Ascertain the purpose served by the spreading of the hood in the cobra.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	purpose	purpose	NOUN	NN	Number=Sing	1	obj	_	_
4	served	serve	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl	_	_
5	by	by	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	spreading	spreading	NOUN	NN	Number=Sing	4	obl	_	_
8	of	of	ADP	IN	_	10	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	hood	hood	NOUN	NN	Number=Sing	7	nmod	_	_
11	in	in	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	cobra	cobra	NOUN	NN	Number=Sing	10	nmod	_	SpaceAfter=No
14	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the purpose |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent purpose=Topic |
| 2 | **serve** | participle |  | the purpose *not said here* |  |  |  | by the spreading of the hood in the cobra | vn masquerade-29.6-2 «NP V PP.attribute»: agent=Agent |
| 3 | **spread** |  |  | the hood in the cobra |  |  |  |  | nom spreading «event transitive»: of=patient |

<!-- .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 -->
The capture of airborne insects

```conllu
# sent_id = question:biology:246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus:e4:o1:1
# text = The capture of airborne insects
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	capture	capture	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	airborne	airborne	ADJ	JJ	Degree=Pos	5	amod	_	_
5	insects	insect	NOUN	NNS	Number=Plur	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **capture** |  |  | airborne insects |  |  |  |  | nom capture «act transitive»: of=patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
The attraction of prey by imitation of a flower

```conllu
# sent_id = question:biology:246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus:e4:o2:1
# text = The attraction of prey by imitation of a flower
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	attraction	attraction	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	prey	prey	NOUN	NN	Number=Sing	2	nmod	_	_
5	by	by	ADP	IN	_	6	case	_	_
6	imitation	imitation	NOUN	NN	Number=Sing	2	nmod	_	_
7	of	of	ADP	IN	_	9	case	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	flower	flower	NOUN	NN	Number=Sing	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **attract** |  | imitation of a flower | prey |  |  |  |  | nom attraction «phenomenon transitive»: of=patient by=agent |
| 2 | **imitate** |  |  | a flower |  |  |  |  | nom imitation «cognition transitive»: of=patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
The regulation of body temperature in the sun

```conllu
# sent_id = question:biology:246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus:e4:o3:1
# text = The regulation of body temperature in the sun
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	regulation	regulation	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	body	body	NOUN	NN	Number=Sing	5	compound	_	_
5	temperature	temperature	NOUN	NN	Number=Sing	2	nmod	_	_
6	in	in	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	sun	sun	NOUN	NN	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **regulate** |  |  | body temperature in the sun |  |  |  |  | nom regulation «communication transitive»: of=patient |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
The issuing of a warning to a potential attacker

```conllu
# sent_id = question:biology:246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus:e4:o4:1
# text = The issuing of a warning to a potential attacker
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	issuing	issuing	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	warning	warning	NOUN	NN	Number=Sing	2	nmod	_	_
6	to	to	ADP	IN	_	9	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	potential	potential	ADJ	JJ	Degree=Pos	9	amod	_	_
9	attacker	attacker	NOUN	NN	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **issue** |  |  | a warning to a potential attacker |  |  |  |  | nom issuing «act transitive»: of=patient |

<!-- div src -->

**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.

<!-- /div -->

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- ← previous: [Defences: venom in snakes, jellyfish,…, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/biology/246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus/e3/)
- next →: [Defences: poison, warning colours and…, test 1](https://md.mova.elamur.ai/free/en/corpora/questions/biology/247-defences-poison-warning-colours-and-mimics/t1/)
- ↑ back to [Defences: venom in snakes, jellyfish, scorpions and the platypus](https://md.mova.elamur.ai/free/en/corpora/questions/biology/246-defences-venom-in-snakes-jellyfish-scorpions-and-the-platypus/)

