---
title: What would happen over many generations if a river fish species got… — Evolution: why giraffes really have lo… · tree and pragmatics
description: What would happen over many generations if a river fish species got trapped in a dark cave? Test 4 · ★★ of lesson 278 «Evolution: why giraffes really have long necks» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's ch
---

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# Test 4 · ★★ · Evolution: why giraffes really have long necks

<!-- .ven lang=en -->
What would happen over many generations if a river fish species got trapped in a dark cave?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **What happens:** happen, trap · **To what, where:** many generations, fish species, dark cave

<!-- .vabout -->
This is test 4 · ★★ of lesson 278 «Evolution: why giraffes really have long necks» 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/278-evolution-why-giraffes-really-have-long-necks/#t4).

## The question {#question}

```conllu
# sent_id = question:biology:278-evolution-why-giraffes-really-have-long-necks:t4:1
# text = What would happen over many generations if a river fish species got trapped in a dark cave?
1	What	what	PRON	WP	PronType=Int	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	happen	happen	VERB	VB	VerbForm=Inf	0	root	_	_
4	over	over	ADP	IN	_	6	case	_	_
5	many	many	ADJ	JJ	Degree=Pos	6	amod	_	_
6	generations	generation	NOUN	NNS	Number=Plur	3	obl	_	_
7	if	if	SCONJ	IN	_	13	mark	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	river	river	NOUN	NN	Number=Sing	10	compound	_	_
10	fish	fish	NOUN	NN	Number=Sing	11	compound	_	_
11	species	species	NOUN	NNS	Number=Plur	13	nsubj:pass	_	_
12	got	get	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	13	aux:pass	_	_
13	trapped	trap	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	advcl	_	_
14	in	in	ADP	IN	_	17	case	_	_
15	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
16	dark	dark	ADJ	JJ	Degree=Pos	17	amod	_	_
17	cave	cave	NOUN	NN	Number=Sing	13	obl	_	SpaceAfter=No
18	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | would |  |  |  |  | over many generations |  | vn occur-48.3-1 «NP V PP»: agent=Theme over generation=Location |
| 2 | **trap** *a condition, not said to happen* | past · passive |  | fish species |  | a dark cave |  |  | vn pocket-9.10 «NP V NP PP.destination»: subject=Theme in cave=Destination |

<!-- .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 would turn into a bat

```conllu
# sent_id = question:biology:278-evolution-why-giraffes-really-have-long-necks:t4:o1:1
# text = It would turn into a bat
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	turn	turn	VERB	VB	VerbForm=Inf	0	root	_	_
4	into	into	ADP	IN	_	6	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
6	bat	bat	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **turn** | would | It |  |  | a bat |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme into bat=Trajectory |

### Option 2 {#o2}

<!-- .ven lang=en -->
It would grow bigger eyes to see in the dark

```conllu
# sent_id = question:biology:278-evolution-why-giraffes-really-have-long-necks:t4:o2:1
# text = It would grow bigger eyes to see in the dark
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	grow	grow	VERB	VB	VerbForm=Inf	0	root	_	_
4	bigger	big	ADJ	JJR	Degree=Cmp	5	amod	_	_
5	eyes	eye	NOUN	NNS	Number=Plur	3	obj	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	see	see	VERB	VB	VerbForm=Inf	3	advcl	_	_
8	in	in	ADP	IN	_	10	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	dark	dark	NOUN	NN	Number=Sing	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **grow** | would | It | bigger eyes |  |  |  |  | vn appear-48.1.1 «PP.location V NP»: agent=Location eye=Theme |
| 2 | **see** | to-infinitive |  |  |  | the dark |  |  | vn comprehend-87.2-1-1 «NP V»: agent=Experiencer |

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

<!-- .ven lang=en -->
Its eyes might slowly get smaller or disappear

```conllu
# sent_id = question:biology:278-evolution-why-giraffes-really-have-long-necks:t4:o3:1
# text = Its eyes might slowly get smaller or disappear
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	eyes	eye	NOUN	NNS	Number=Plur	5	nsubj	_	_
3	might	might	AUX	MD	VerbForm=Fin	5	aux	_	_
4	slowly	slowly	ADV	RB	_	5	advmod	_	_
5	get	get	VERB	VB	VerbForm=Inf	0	root	_	_
6	smaller	small	ADJ	JJR	Degree=Cmp	5	xcomp	_	_
7	or	or	CCONJ	CC	_	8	cc	_	_
8	disappear	disappear	VERB	VB	VerbForm=Inf	5	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **get** | might | Its eyes |  |  |  |  | slowly, small *property* | vn comprehend-87.2-1 «NP V S\_ING»: agent=Experiencer |
| 2 | **disappear** | infinitive | Its eyes *not said here* |  |  |  |  |  | vn disappearance-48.2-1 «NP V»: agent=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
Nothing could ever change

```conllu
# sent_id = question:biology:278-evolution-why-giraffes-really-have-long-necks:t4:o4:1
# text = Nothing could ever change
1	Nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	4	nsubj	_	_
2	could	could	AUX	MD	VerbForm=Fin	4	aux	_	_
3	ever	ever	ADV	RB	PronType=Ind	4	advmod	_	_
4	change	change	VERB	VB	VerbForm=Inf	0	root	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **change** | could | Nothing |  |  |  | ever |  | vn dress-41.1.1-1-1 «NP V»: agent=Agent |

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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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