---
title: Why are scientists freezing cells of the northern white rhino? — The African savanna area: giraffes, ze… · tree and pragmatics
description: Why are scientists freezing cells of the northern white rhino? Test 11 of lesson 101 «The African savanna area: giraffes, zebras, rhinos and antelopes» 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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# Test 11 · The African savanna area: giraffes, zebras, rhinos and ant…

<!-- .ven lang=en -->
Why are scientists freezing cells of the northern white rhino?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** scientists · **What happens:** be

<!-- .vabout -->
This is test 11 of lesson 101 «The African savanna area: giraffes, zebras, rhinos and antelopes» 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/101-the-african-savanna-area-giraffes-zebras-rhinos/#t11).

## The question {#question}

```conllu
# sent_id = question:biology:101-the-african-savanna-area-giraffes-zebras-rhinos:t11:1
# text = Why are scientists freezing cells of the northern white rhino?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	scientists	scientist	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	freezing	freeze	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	_	_
5	cells	cell	NOUN	NNS	Number=Plur	4	obj	_	_
6	of	of	ADP	IN	_	10	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
8	northern	northern	ADJ	JJ	Degree=Pos	10	amod	_	_
9	white	white	ADJ	JJ	Degree=Pos	10	amod	_	_
10	rhino	rhino	NOUN	NN	Number=Sing	5	nmod	_	SpaceAfter=No
11	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | scientists |  |  |  |  | freeze *property* | tree rules |

<!-- .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 -->
To keep the cells safe as special food for zoo animals

```conllu
# sent_id = question:biology:101-the-african-savanna-area-giraffes-zebras-rhinos:t11:o1:1
# text = To keep the cells safe as special food for zoo animals
1	To	to	PART	TO	_	2	mark	_	_
2	keep	keep	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	cells	cell	NOUN	NNS	Number=Plur	2	obj	_	_
5	safe	safe	ADJ	JJ	Degree=Pos	2	xcomp	_	_
6	as	as	ADP	IN	_	8	case	_	_
7	special	special	ADJ	JJ	Degree=Pos	8	amod	_	_
8	food	food	NOUN	NN	Number=Sing	2	obl	_	_
9	for	for	ADP	IN	_	11	case	_	_
10	zoo	zoo	NOUN	NN	Number=Sing	11	compound	_	_
11	animals	animal	NOUN	NNS	Number=Plur	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | to-infinitive |  | the cells |  |  |  | as special food; for zoo animals; safe *property* | vn keep-15.2 «NP V NP»: agent=Agent cell=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
To turn them into black rhinos

```conllu
# sent_id = question:biology:101-the-african-savanna-area-giraffes-zebras-rhinos:t11:o2:1
# text = To turn them into black rhinos
1	To	to	PART	TO	_	2	mark	_	_
2	turn	turn	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	2	obj	_	_
4	into	into	ADP	IN	_	6	case	_	_
5	black	black	ADJ	JJ	Degree=Pos	6	amod	_	_
6	rhinos	rhino	NOUN	NNS	Number=Plur	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **turn** | to-infinitive |  | them *= they* |  | black rhinos |  |  | vn roll-51.3.1 «NP V NP PP.trajectory»: agent=Agent they=Theme into rhino=Trajectory |

### Option 3 {#o3}

<!-- .ven lang=en -->
To make rhino horn for medicine

```conllu
# sent_id = question:biology:101-the-african-savanna-area-giraffes-zebras-rhinos:t11:o3:1
# text = To make rhino horn for medicine
1	To	to	PART	TO	_	2	mark	_	_
2	make	make	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	rhino	rhino	NOUN	NN	Number=Sing	4	compound	_	_
4	horn	horn	NOUN	NN	Number=Sing	2	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	medicine	medicine	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | to-infinitive |  | rhino horn |  |  |  | for medicine | vn build-26.1-1 «NP V NP PP.beneficiary»: agent=Agent horn=Material for medicine=Beneficiary |

### Option 4 · ← Mova's choice · ✓ the right answer {#o4}

<!-- .ven lang=en -->
To try to make new calves after the last male died

```conllu
# sent_id = question:biology:101-the-african-savanna-area-giraffes-zebras-rhinos:t11:o4:1
# text = To try to make new calves after the last male died
1	To	to	PART	TO	_	2	mark	_	_
2	try	try	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	to	to	PART	TO	_	4	mark	_	_
4	make	make	VERB	VB	VerbForm=Inf	2	xcomp	_	_
5	new	new	ADJ	JJ	Degree=Pos	6	amod	_	_
6	calves	calf	NOUN	NNS	Number=Plur	4	obj	_	_
7	after	after	SCONJ	IN	_	11	mark	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
9	last	last	ADJ	JJ	Degree=Pos	10	amod	_	_
10	male	male	NOUN	NN	Number=Sing	11	nsubj	_	_
11	died	die	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	4	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **try** | to-infinitive |  |  |  |  |  |  | vn try-61.1 «NP V S\_INF»: agent=Agent clause=Eventuality |
| 2 | **make** *not said to happen* | to-infinitive |  | new calves |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset calf=Product |
| 3 | **die** | past | the last male |  |  |  |  |  | vn calibratable\_cos-45.6.1 «NP.attribute V»: agent=Attribute |

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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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