---
title: What would happen to a forest if every fungus disappeared? — Fungi: mushrooms, mould and yeast · tree and pragmatics
description: What would happen to a forest if every fungus disappeared? Test 4 of lesson 62 «Fungi: mushrooms, mould and yeast» 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 4 · Fungi: mushrooms, mould and yeast

<!-- .ven lang=en -->
What would happen to a forest if every fungus disappeared?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 3 · wrong ✗ · **Who acts:** fungus · **What happens:** happen, disappear

<!-- .vabout -->
This is test 4 of lesson 62 «Fungi: mushrooms, mould and yeast» 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/62-fungi-mushrooms-mould-and-yeast/#t4).

## The question {#question}

```conllu
# sent_id = question:biology:62-fungi-mushrooms-mould-and-yeast:t4:1
# text = What would happen to a forest if every fungus disappeared?
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	to	to	ADP	IN	_	6	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
6	forest	forest	NOUN	NN	Number=Sing	3	obl	_	_
7	if	if	SCONJ	IN	_	10	mark	_	_
8	every	every	DET	DT	PronType=Tot	9	det	_	_
9	fungus	fungus	NOUN	NN	Number=Sing	10	nsubj	_	_
10	disappeared	disappear	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	advcl	_	SpaceAfter=No
11	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | would |  |  |  |  |  | to a forest | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **disappear** *a condition, not said to happen* | participle | every fungus |  |  |  |  |  | vn disappearance-48.2-1 «NP V»: agent=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 {#o1}

<!-- .ven lang=en -->
The forest would fill with mushrooms

```conllu
# sent_id = question:biology:62-fungi-mushrooms-mould-and-yeast:t4:o1:1
# text = The forest would fill with mushrooms
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	forest	forest	NOUN	NN	Number=Sing	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	fill	fill	VERB	VB	VerbForm=Inf	0	root	_	_
5	with	with	ADP	IN	_	6	case	_	_
6	mushrooms	mushroom	NOUN	NNS	Number=Plur	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fill** | would | the forest |  |  |  |  | with mushrooms | vn other\_cos-45.4 «NP V NP PP.instrument»: agent=Agent with mushroom=Instrument |

### Option 2 {#o2}

<!-- .ven lang=en -->
Nothing would change at all

```conllu
# sent_id = question:biology:62-fungi-mushrooms-mould-and-yeast:t4:o2:1
# text = Nothing would change at all
1	Nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	change	change	VERB	VB	VerbForm=Inf	0	root	_	_
4	at	at	ADP	IN	_	5	case	_	_
5	all	all	DET	DT	PronType=Tot	3	obl	_	_
```

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

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

<!-- .ven lang=en -->
Dead wood and leaves would pile up and many trees would grow badly

```conllu
# sent_id = question:biology:62-fungi-mushrooms-mould-and-yeast:t4:o3:1
# text = Dead wood and leaves would pile up and many trees would grow badly
1	Dead	dead	ADJ	JJ	Degree=Pos	2	amod	_	_
2	wood	wood	NOUN	NN	Number=Sing	6	nsubj	_	_
3	and	and	CCONJ	CC	_	4	cc	_	_
4	leaves	leaf	NOUN	NNS	Number=Plur	2	conj	_	_
5	would	would	AUX	MD	VerbForm=Fin	6	aux	_	_
6	pile	pile	VERB	VB	VerbForm=Inf	0	root	_	_
7	up	up	ADP	RP	_	6	compound:prt	_	_
8	and	and	CCONJ	CC	_	12	cc	_	_
9	many	many	ADJ	JJ	Degree=Pos	10	amod	_	_
10	trees	tree	NOUN	NNS	Number=Plur	12	nsubj	_	_
11	would	would	AUX	MD	VerbForm=Fin	12	aux	_	_
12	grow	grow	VERB	VB	VerbForm=Inf	6	conj	_	_
13	badly	badly	ADV	RB	Degree=Pos	12	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **pile up** | would | Dead wood and leaves |  |  |  |  |  | vn spray-9.7-1-1 «NP V PP.destination»: agent=Theme |
| 2 | **grow** | would | many trees |  |  |  |  | badly *property* | vn appear-48.1.1 «NP V»: agent=Theme |

### Option 4 · ← Mova's choice {#o4}

<!-- .ven lang=en -->
Trees would grow twice as fast without any fungi stealing their sugar

```conllu
# sent_id = question:biology:62-fungi-mushrooms-mould-and-yeast:t4:o4:1
# text = Trees would grow twice as fast without any fungi stealing their sugar
1	Trees	tree	NOUN	NNS	Number=Plur	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	grow	grow	VERB	VB	VerbForm=Inf	0	root	_	_
4	twice	twice	ADV	RB	NumForm=Word|NumType=Mult	3	advmod	_	_
5	as	as	ADV	RB	_	6	advmod	_	_
6	fast	fast	ADV	RB	Degree=Pos	4	conj	_	_
7	without	without	SCONJ	IN	_	10	mark	_	_
8	any	any	DET	DT	PronType=Ind	9	det	_	_
9	fungi	fungus	NOUN	NNS	Number=Plur	10	nsubj	_	_
10	stealing	steal	VERB	VBG	Tense=Pres|VerbForm=Part	3	advcl	_	_
11	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	12	nmod:poss	_	_
12	sugar	sugar	NOUN	NN	Number=Sing	10	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **grow** | would | Trees |  |  |  |  | twice *property* | vn appear-48.1.1 «NP V»: agent=Theme |
| 2 | **steal** | gerund | any fungi | fungi's sugar |  |  |  |  | vn appear-48.1.1 «PP.location V NP»: agent=Location sugar=Theme |

<!-- 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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