Swamps, marshes, mangroves and bogs

Tests: 5 of 12 right · Exam: 1 of 4 right · Kind: plain · Understood: 8 of 16 · Run: 2026-10-18, commit f3c23ea72

Lesson 11 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 ✗

my cousin says swamps are just useless smelly land, better drained. right?

1. No, but only because they look pretty — ← Mova's choice · no support
2. Yes, draining them always stops floods and gives farms — no support
3. No, wetlands soak up floods, clean water and store lots of carbon — ✓ the right answer · no support
4. Yes, nothing useful lives in them — 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 2 · right ✓

A wooden tool and a lump of butter 2000 years old were dug out of an Irish bog in good shape. Why had they not rotted?

1. Someone had wrapped them in plastic — no support
2. The butter was made of something that never rots — no support
3. Peat is a kind of freezer kept below zero all year — no support
4. Bogs are cold, wet, acid and airless, so rotting is very slow — ← Mova's choice · ✓ the right answer · score 5

Why: It took the question to ask why something happens (its cause). It chose option 4 with score 5, the only option with support. Its support: lesson 11, line 9: «Peat is half-rotted dead plants, mostly bog moss, piled up over thousands of years; it grows only about 1 millimetre a year, because in cold, wet, acid, airles…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «airless bogs» (+3); the same property (+1); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics

Test 3 · wrong ✗

In a cartoon, a Venus flytrap chases the hero through a jungle snapping at him. What is wrong?

1. Nothing, they hunt large animals in jungles — ← Mova's choice · no support
2. It is a small plant of Carolina bogs that cannot move or eat people — ✓ the right answer · no support
3. It should be chasing him underwater — no support
4. It should be smaller, but it does live in jungles and can walk about slowly at night — 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 · wrong ✗

What would happen to a Venus flytrap if every raindrop made it snap shut?

1. It would catch many more insects than before — ← Mova's choice · score 3
2. It would waste lots of energy closing on nothing — ✓ the right answer · score 0
3. It would grow twice as fast — no support
4. Nothing, closing costs it no energy — no support

Why: It took the question to ask what happens next. It chose option 1 with score 3, against 0 for the next best. Its support: lesson 11, line 10: «Bog soil has very little nitrogen, so the sundew catches insects on sticky drops and the Venus flytrap snaps shut on them, and both digest their prey to get ni…», reached through a sentence linked to the one the question matched. What matched: the same action «catch» (+2); the same thing acted on «insects» (+2). Against it: a different doer (counts against) (-1). The right option, 2, scored 0. · the question and its options parsed, with trees and pragmatics

Test 5 · wrong ✗

Josh counts 3 herons and 2 mudskippers by the pond. How many hearts is that?

1. 3, because fish have no hearts — ← Mova's choice · score 8
2. 7, herons have two hearts each — score 8
3. 5, each animal has one heart — ✓ the right answer · score 8
4. 10, as each one has two hearts — no support

Why: It took the question to ask what it is done to. It chose option 1 with score 8, tied with another option at 8 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 8, line 18: «A squid has 8 arms and 2 longer tentacles, and like an octopus it has 3 hearts.», reached through the option's own match among the sentences about the question's things. What matched: it fills the role the question asks for (+3); the same doer «fish» (+2); the same thing acted on «3 hearts» (+2); the same light verb (be, have, do, get, go) (+1). The right option, 3, scored 8. · the question and its options parsed, with trees and pragmatics

Test 6 · wrong ✗

crap there's like 4 dragonflies on the reeds, how many wings is that lol

1. 8 — ← Mova's choice · no support
2. 4 — no support
3. 24 — no support
4. 16 — ✓ the right answer · 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 7 · wrong ✗

Mia wants to jump off the boardwalk to grab a sundew in the bog. What should she do?

1. Stay on the boardwalk, bogs can be deep and dangerous — ✓ the right answer · score 6
2. Jump, bog moss is soft and always safe — no support
3. Run across very quickly, so that she does not have time to sink — no support
4. Jump only if her boots are waterproof — ← Mova's choice · score 8

Why: It took the question to ask what is done. It chose option 4 with score 8, against 6 for the next best. Its support: lesson 6, line 16: «Lemmings spend the winter in tunnels under the snow, which traps air like a blanket; the story that they jump off cliffs together is a myth helped by a faked 1…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same action «jump off» (+4). Against it: a different doer (counts against) (-2). The right option, 1, scored 6. · the question and its options parsed, with trees and pragmatics

Test 8 · wrong ✗

Why would a mangrove tree die if all its breathing roots were covered by thick mud?

1. The salt would wash out of its leaves — no support
2. It would get far too much fresh water — ← Mova's choice · score 4
3. Its buried roots would suffocate without air — ✓ the right answer · no support
4. Fish would eat its roots — no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 4, the only option with support. Its support: lesson 2, line 19: «Trees release so much water from their leaves that the Amazon makes much of its own rain, so cutting down the forest can make the region drier.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «trees» (+2); the same thing acted on «much water» (+2). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 9 · right ✓

Ben says a dragonfly is born with wings and flies right away. Is that right?

1. Yes, dragonflies never touch water — no support
2. Yes, but only for one day — no support
3. No, it starts as a caterpillar on a leaf and makes a cocoon in the reeds — no support
4. No, it lives underwater as a nymph, often for years, first — ← Mova's choice · ✓ the right answer · score 10

Why: It took the question to ask which statement is true. It chose option 4 with score 10, the only option with support. Its support: lesson 11, line 17: «A dragonfly lives one to several years as a nymph underwater, then climbs up a reed and its skin splits to let the winged adult out; the adult has 6 legs and 4…», reached through the same lesson line as the sentence the question matched. What matched: the same action «live» (+3); the same doer «dragonfly» (+3); the same property (+2); the same circumstance (+2). · the question and its options parsed, with trees and pragmatics

Test 10 · right ✓

Old stories tell of ghostly lights dancing over marshes at night. What do scientists say?

1. They are reflections of the Moon on the mud — no support
2. They are proven to be fireflies in every case — no support
3. They are definitely the ghosts of people who were lost in the bog long ago — no support
4. They may come from marsh gas catching fire, but it is not proven — ← Mova's choice · ✓ the right answer · score 4

Why: It took the question to ask what it is done to. It chose option 4 with score 4, the only option with support. Its support: lesson 11, line 16: «In airless marsh mud, bacteria rot dead plants and make methane and smelly hydrogen sulphide, the rotten-egg smell; old stories of will-o'-the-wisp lights may…», reached through the remembered sentence the question matched. What matched: the same place «marsh gas» (+4); the same action «come» (+3). Against it: a different doer (counts against) (-3). · the question and its options parsed, with trees and pragmatics

Test 11 · right ✓

A mangrove seedling drops into the tide instead of the mud. What can happen?

1. It can float for months and take root on a faraway shore — ← Mova's choice · ✓ the right answer · score 10
2. It sinks to the bottom and grows on the seabed among the fish and the coral — score 8
3. It turns back into a seed — no support
4. It dies at once in the salty water — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 10, against 8 for the next best. Its support: lesson 11, line 7: «Red mangrove seedlings start growing while still hanging on the parent tree, then drop like darts into the mud or float away; they can drift for months and sti…», reached through the same lesson line as the sentence the question matched. What matched: the same action «take» (+3); the same doer «seedlings» (+3); the same thing acted on «root» (+2); the same place «faraway shore» (+2). · the question and its options parsed, with trees and pragmatics

Test 12 · right ✓

why do bog plants bother eating flies, they got leaves innit

1. Their leaves make food from light, but the bog soil lacks nitrogen — ← Mova's choice · ✓ the right answer · no support
2. Flies give them water in dry summers — no support
3. They have no leaves and must eat to live — no support
4. They only eat flies to stop the flies from stinging them and their flowers — 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 1 · formal language · right ✓

Identify the principal reason for which certain mangrove species develop erect aerial roots.

1. To obtain air, the saturated saline mud being almost devoid of oxygen — ← Mova's choice · ✓ the right answer · no support
2. To repel herbivorous mammals from the base of the trunk — no support
3. To absorb fresh rainwater prior to its contamination by the salt of the tide — no support
4. To capture marine organisms as a source of nourishment — 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 · wrong ✗

Which of the following statements most accurately characterises the formation of peat?

1. It is formed instantaneously by volcanic activity beneath bogs — ← Mova's choice · no support
2. It is composed principally of the remains of marine animals — no support
3. It accumulates at about one millimetre per annum from incompletely decomposed vegetation — ✓ the right answer · no support
4. It is deposited annually by rivers in flood at about one metre per annum — 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 · wrong ✗

Ascertain the condition under which the trap of Dionaea muscipula, the Venus flytrap, is caused to close.

1. A single contact of any kind upon its outer surface, whether by an insect or by a drop of rain — ← Mova's choice · no support
2. Any change in the temperature of the surrounding air — no support
3. The stimulation of its trigger hairs twice within approximately twenty seconds — ✓ the right answer · no support
4. The onset of darkness at the conclusion of each day — 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 4 · formal language · wrong ✗

Select the response consistent with the established facts concerning the function of wetlands in respect of flooding.

1. They exert no influence whatsoever upon flooding — ← Mova's choice · no support
2. They cause precipitation to fall in neighbouring regions instead of upon the wetland — no support
3. They accelerate the passage of flood water towards settlements — no support
4. They absorb flood water and subsequently release it gradually — ✓ the right answer · no support

Why: Nothing it remembers matched the question, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

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