Deserts of the world: fennec foxes, fog-drinking beetles, camels and silver ants

Tests: 6 of 11 right · Exam: 3 of 4 right · Kind: ★ · Understood: 9 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 182 of the biology course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: the lesson in the corpora.

Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.

Test 1 · ★ · wrong ✗

In the cartoon Road Runner always zooms away from Wile E. Coyote. What is true about the real animals?

1. Coyotes never hunt roadrunners at all in the real desert — score 1
2. Roadrunners cannot run, only fly — no support
3. A real coyote can run faster than a real roadrunner — ✓ the right answer · score 2
4. Roadrunners are faster than cheetahs — ← Mova's choice · score 7

Why: It took the question to ask which statement is true. It chose option 4 with score 7, against 2 for the next best. Its support: lesson 20, line 10: «The cheetah is the fastest land animal, reaching about 100 kilometres per hour in a sprint with long legs, a light body, a bendy spine and a steering tail, but…», reached through the option's own match among the sentences about the question's things. What matched: the same property (+3); the same circumstance (+2); the same light verb (be, have, do, get, go) (+2). The right option, 3, scored 2. · the question and its options parsed, with trees and pragmatics

Test 2 · ★ · wrong ✗

«camel humps r full of water, everyone knows that» What is right?

1. Yes, they fill them from rivers — ← Mova's choice · no support
2. No, the humps are full of air — no support
3. No, the humps store fat; camels save water in many other ways — ✓ the right answer · no support
4. Yes, each hump is a water tank that they fill when they drink — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 3 · ★ · wrong ✗

«a camel with 2 humps and 2 camels with 1 hump each, how many humps»

1. 5 — ← Mova's choice · no support
2. 4 — ✓ the right answer · no support
3. 6 — no support
4. 3 — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 4 · ★ · right ✓

«5 fennec foxes in the zoo, count the ears»

1. 10 — ← Mova's choice · ✓ the right answer · no support
2. 20 — no support
3. 5 — no support
4. 15 — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 5 · ★ · right ✓

In Zootopia Finnick the fennec fox has a deep voice and big ears. Which part of the real animal is right?

1. Fennecs drive vans in the desert — no support
2. The huge ears, which let out heat and catch the sound of insects — ← Mova's choice · ✓ the right answer · score 9
3. The deep voice, which scares lions — no support
4. Fennecs live in cities — score 2

Why: It took the question to ask who or what does it. It chose option 2 with score 9, against 2 for the next best. Its support: lesson 106, line 6: «Arctic foxes have small ears, short legs and short noses that lose little heat, while the desert fennec fox has huge ears that give off heat to keep it cool.», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+4); the same doer «huge ears» (+3); the same thing acted on «heat» (+2). · the question and its options parsed, with trees and pragmatics

Test 6 · ★ · wrong ✗

What would happen if a thick fog stopped coming to the Namib Desert?

1. The beetles would start drinking from the sea — ← Mova's choice · score 3
2. Fog-drinking beetles and plants that catch fog would lose their water — ✓ the right answer · score 3
3. The desert would turn into a forest — no support
4. Nothing, because beetles never need water — score 3

Why: It took the question to ask what happens next. It chose option 1 with score 3, tied with another option at 3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 182, line 2: «Desert animals solve it in clever ways: some drink fog, some get all their water from food, some hide in burrows by day and come out at night.», reached through what followed the sentence the question matched. What matched: the same action «drink» (+4). Against it: a different doer (counts against) (-1). The right option, 2, scored 3. · the question and its options parsed, with trees and pragmatics

Test 7 · ★ · wrong ✗

«dog barked at a lizard and it shot blood out its eyes, gross» What is going on?

1. It is a horned lizard defending itself with bad-tasting blood — ✓ the right answer · score 4
2. The lizard is crying because it is sad and lonely in the dry desert — ← Mova's choice · score 6
3. The lizard is badly ill — score 2
4. The dog bit it — no support

Why: It took the question to ask who or what does it. It chose option 2 with score 6, against 4 for the next best. Its support: lesson 146, line 11: «Draco lizards of South-East Asia, called flying dragons, glide over 10 metres on flaps of skin held out on long ribs.», reached through the option's own match among the sentences about the question's things. What matched: the same action «call» (+3); it fills the role the question asks for (+2); the same doer «draco lizards» (+1). The right option, 1, scored 4. · the question and its options parsed, with trees and pragmatics

Test 8 · ★ · right ✓

A sidewinder leaves strange tracks in the sand. What shape are they?

1. Short J-shaped marks side by side — ← Mova's choice · ✓ the right answer · no support
2. One long straight line in the sand — no support
3. Round holes — no support
4. Zigzag footprints — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 9 · ★ · right ✓

Why might a desert animal hide in a burrow by day and come out at night?

1. It is much cooler at night, so it loses less water — ← Mova's choice · ✓ the right answer · score 0
2. Food only grows at night — no support
3. It is afraid of the moon — score -1
4. It cannot see in daylight because the sun is far too bright for its eyes — score 0

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 0, tied with another option at 0 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 165, line 13: «Many desert animals, like hopping mice, get almost all their water from their food, and waterholes fill with animals in the cool of morning and evening.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «water» (+1). Against it: the same doer «many desert animals» (-1). · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · right ✓

«my uncle said cactus spines are just thorns from the stem» What is right?

1. No, they are tiny roots — no support
2. Yes, they grow out of the stem bark — no support
3. No, the spines are changed leaves — ← Mova's choice · ✓ the right answer · score 5
4. Yes, they are dead flowers — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 5, the only option with support. Its support: lesson 182, line 14: «A cactus stores water in its stem and swells after rain; its spines are changed leaves that shade it and stop animals eating it, and a big saguaro can hold ove…», reached through the same lesson line as the sentence the question matched. What matched: the same action «change» (+4); the same thing acted on «spines» (+1). · the question and its options parsed, with trees and pragmatics

Test 11 · ★ · right ✓

In Rango, a chameleon walks into a desert town looking for water. Why is water the main worry in a desert?

1. Animals in deserts never drink — no support
2. Deserts are always flooded — no support
3. Very little rain falls, so water is the hardest thing to find — ← Mova's choice · ✓ the right answer · score 2
4. The sand is full of rivers running under it, so water is easy to find — score 0

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 2, against 0 for the next best. Its support: lesson 182, line 1: «A desert is a place where very little rain falls, so the hardest problem for every living thing there is water, and in hot deserts the second problem is heat.», reached through the option's own match among the sentences about the question's things. What matched: the same light verb (be, have, do, get, go) (+2); the same thing acted on «living thing» (+1). Against it: the same doer «water» (-1). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Identify the substance which is principally stored within the hump of a camel.

1. Water — ← Mova's choice · no support
2. Just air — no support
3. Fat — ✓ the right answer · no support
4. Blood — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · right ✓

Which of the following statements most accurately characterises the method by which the Namib fog-basking beetle obtains water?

1. Droplets condense from fog upon its back and run down to its mouth — ← Mova's choice · ✓ the right answer · no support
2. It extracts moisture exclusively from cactus stems — no support
3. It excavates subterranean wells — no support
4. It consumes the blood of larger animals — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · right ✓

Ascertain the function of the spines borne by a cactus.

1. They are roots which have emerged above ground — no support
2. They are modified leaves which shade the plant and deter herbivores — ← Mova's choice · ✓ the right answer · score 5
3. They serve as organs of reproduction — no support
4. They absorb rainwater directly from the air — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 5, the only option with support. Its support: lesson 57, line 11: «A cactus's spines are leaves changed into points; its fat green stem stores water and does the photosynthesis, and a thick waxy skin keeps water in; many cacti…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «leaves» (+3); the same light verb (be, have, do, get, go) (+2). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · right ✓

Select the response consistent with the established facts concerning the kangaroo rat.

1. It stores water in its tail — score 3
2. It drinks several litres of water daily — score 2
3. It may live without drinking, obtaining water from seeds and producing very dry urine — ← Mova's choice · ✓ the right answer · score 6
4. It inhabits rainforests exclusively — score 2

Why: It took the question to ask which statement is true. It chose option 3 with score 6, against 3 for the next best. Its support: lesson 182, line 12: «Kangaroo rats of North American deserts can live without ever drinking, getting water from seeds and making very dry urine.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «water» (+3); the same place «seeds» (+3). · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/182-deserts-of-the-world-fennec-foxes-fog-drinking-beetles-camels-and-silver-ants/