---
title: Identify the mechanism by which many spiders adhere to vertical surf… — Spider-Man: real spider senses, climbi… · tree and pragmatics
description: Identify the mechanism by which many spiders adhere to vertical surfaces of glass. Exam question 1 of lesson 148 «Spider-Man: real spider senses, climbing and bites» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's cho
---

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# Exam question 1 · Spider-Man: real spider senses, climbing and bites

<!-- .ven lang=en -->
Identify the mechanism by which many spiders adhere to vertical surfaces of glass.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you, many spiders · **What happens:** identify, adhere · **To what, where:** mechanism

<!-- .vabout -->
This is exam question 1 of lesson 148 «Spider-Man: real spider senses, climbing and bites» 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/148-spider-man-real-spider-senses-climbing-and-bites/#e1).

## The question {#question}

```conllu
# sent_id = question:biology:148-spider-man-real-spider-senses-climbing-and-bites:e1:1
# text = Identify the mechanism by which many spiders adhere to vertical surfaces of glass.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	mechanism	mechanism	NOUN	NN	Number=Sing	1	obj	_	_
4	by	by	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	8	obl	_	_
6	many	many	ADJ	JJ	Degree=Pos	7	amod	_	_
7	spiders	spider	NOUN	NNS	Number=Plur	8	nsubj	_	_
8	adhere	adhere	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	1	parataxis	_	_
9	to	to	ADP	IN	_	11	case	_	_
10	vertical	vertical	ADJ	JJ	Degree=Pos	11	amod	_	_
11	surfaces	surface	NOUN	NNS	Number=Plur	8	obl	_	_
12	of	of	ADP	IN	_	13	case	_	_
13	glass	glass	NOUN	NN	Number=Sing	11	nmod	_	SpaceAfter=No
14	.	.	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 mechanism |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent mechanism=Theme |
| 2 | **adhere** | present | many spiders |  |  |  |  | to vertical surfaces of glass | vn cling-22.5 «NP V PP.co-theme»: agent=Theme to surface=Co-Theme |

<!-- .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 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Numerous minute hairs upon the feet exploit very small attractive forces between molecules

```conllu
# sent_id = question:biology:148-spider-man-real-spider-senses-climbing-and-bites:e1:o1:1
# text = Numerous minute hairs upon the feet exploit very small attractive forces between molecules
1	Numerous	numerous	ADJ	JJ	Degree=Pos	3	amod	_	_
2	minute	minute	NOUN	NN	Number=Sing	3	compound	_	_
3	hairs	hair	NOUN	NNS	Number=Plur	7	nsubj	_	_
4	upon	upon	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	feet	foot	NOUN	NNS	Number=Plur	3	nmod	_	_
7	exploit	exploit	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	very	very	ADV	RB	_	9	advmod	_	_
9	small	small	ADJ	JJ	Degree=Pos	11	amod	_	_
10	attractive	attractive	ADJ	JJ	Degree=Pos	11	amod	_	_
11	forces	force	NOUN	NNS	Number=Plur	7	obj	_	_
12	between	between	ADP	IN	_	13	case	_	_
13	molecules	molecule	NOUN	NNS	Number=Plur	11	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **exploit** | present | Numerous minute hairs upon the feet | small attractive forces |  |  |  | between molecules | vn use-105.1 «NP V NP»: agent=Agent force=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
The negligible weight of the animal, which precludes any possibility of falling from a surface

<!-- fold The tree, 15 words -->
```conllu
# sent_id = question:biology:148-spider-man-real-spider-senses-climbing-and-bites:e1:o2:1
# text = The negligible weight of the animal, which precludes any possibility of falling from a surface
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	negligible	negligible	ADJ	JJ	Degree=Pos	3	amod	_	_
3	weight	weight	NOUN	NN	Number=Sing	9	nsubj	_	_
4	of	of	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	animal	animal	NOUN	NN	Number=Sing	3	nmod	_	SpaceAfter=No
7	,	,	PUNCT	,	_	9	punct	_	_
8	which	which	PRON	WDT	PronType=Rel	9	nsubj	_	_
9	precludes	preclude	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
10	any	any	DET	DT	PronType=Ind	11	det	_	_
11	possibility	possibility	NOUN	NN	Number=Sing	9	obj	_	_
12	of	of	SCONJ	IN	_	13	mark	_	_
13	falling	fall	VERB	VBG	VerbForm=Ger	11	acl	_	_
14	from	from	ADP	IN	_	16	case	_	_
15	a	a	DET	DT	Definite=Ind|PronType=Art	16	det	_	_
16	surface	surface	NOUN	NN	Number=Sing	13	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **preclude** | present | the negligible weight of the animal | any possibility |  |  |  |  | vn exclude-107.3-1 «NP V NP»: agent=Agent possibility=Theme |
| 2 | **fall** | gerund | any possibility *not said here* |  |  | a surface |  |  | vn escape-51.1-1 «NP V PP.initial\_location»: agent=Theme from surface=Initial\_Location |

### Option 3 {#o3}

<!-- .ven lang=en -->
The deposition of adhesive silk upon each footstep

```conllu
# sent_id = question:biology:148-spider-man-real-spider-senses-climbing-and-bites:e1:o3:1
# text = The deposition of adhesive silk upon each footstep
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	deposition	deposition	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	adhesive	adhesive	ADJ	JJ	Degree=Pos	5	amod	_	_
5	silk	silk	NOUN	NN	Number=Sing	2	nmod	_	_
6	upon	upon	ADP	IN	_	8	case	_	_
7	each	each	DET	DT	PronType=Tot	8	det	_	_
8	footstep	footstep	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **depose** |  | adhesive silk |  |  |  |  | upon each footstep | nom deposition «process intransitive»: of=agent upon=obl |

### Option 4 {#o4}

<!-- .ven lang=en -->
Suction cups upon the feet in the manner of an octopus

```conllu
# sent_id = question:biology:148-spider-man-real-spider-senses-climbing-and-bites:e1:o4:1
# text = Suction cups upon the feet in the manner of an octopus
1	Suction	suction	NOUN	NN	Number=Sing	2	compound	_	_
2	cups	cup	NOUN	NNS	Number=Plur	0	root	_	_
3	upon	upon	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	feet	foot	NOUN	NNS	Number=Plur	2	nmod	_	_
6	in	in	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	manner	manner	NOUN	NN	Number=Sing	5	nmod	_	_
9	of	of	ADP	IN	_	11	case	_	_
10	an	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
11	octopus	octopus	NOUN	NN	Number=Sing	8	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.

<!-- /div -->

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- ↑ back to [Spider-Man: real spider senses, climbing and bites](https://md.mova.elamur.ai/free/en/corpora/questions/biology/148-spider-man-real-spider-senses-climbing-and-bites/)