Babies: eggs, live birth, pouches and parents

Tests: 9 of 12 right · Exam: 0 of 4 right · Kind: ★★ · Understood: 14 of 16 · Run: 2026-10-18, commit f3c23ea72

Lesson 49 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 · ★★ · right ✓

«storks bring babies, that's why they're on the cards» What is right?

1. Storks bring only baby birds — score 0
2. Right, storks bring all babies — score 0
3. Babies grow inside their mothers; the stork is just an old story — ← Mova's choice · ✓ the right answer · score 2
4. Right, but only in Europe, where the storks nest on the roofs — no support

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 49, line 1: «Animals have babies in three main ways: they lay eggs that hatch outside, they give birth to live young that grew inside the mother, or, like kangaroos, they g…», reached through the option's own match among the sentences about the question's things. What matched: the same action «grow» (+1); the same doer «tiny babies» (+1). · the question and its options parsed, with trees and pragmatics

Test 2 · ★★ · right ✓

In a cartoon the penguin mum sits on the egg all winter while dad goes fishing. What really happens with emperor penguins?

1. The dad keeps the egg warm while the mum feeds at sea — ← Mova's choice · ✓ the right answer · score 12
2. Exactly what the cartoon shows — score 3
3. The egg is kept warm in the sea — score 10
4. Both parents leave the egg in the snow — score 2

Why: It took the question to ask which statement is true. It chose option 1 with score 12, against 10 for the next best. Its support: lesson 49, line 2: «Some parents never meet their babies, like the sea turtle that lays her eggs in the sand and swims away, while others work for months, like the emperor penguin…», reached through the remembered sentence the question matched. What matched: the same thing acted on «egg» (+5); the same property (+3); the same action «keep» (+2); the same doer «penguin dad» (+2). · the question and its options parsed, with trees and pragmatics

Test 3 · ★★ · right ✓

«that seahorse is well fat, she's having babies» What is right?

1. Probably he: seahorse fathers carry the eggs in a pouch — ← Mova's choice · ✓ the right answer · no support
2. It is just a fat seahorse that ate too much — no support
3. Seahorses have no babies at all, they just split into two halves — no support
4. Right, only female seahorses swell up — 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 ✓

«a croc carrying babies in its mouth, it's eating them!!» What is really happening?

1. She is eating them one by one — score 4
2. She is cooling them in her mouth — score 4
3. The mother is gently carrying her babies to the water — ← Mova's choice · ✓ the right answer · score 7
4. She is stealing another crocodile's babies to raise as her own — score 4

Why: It took the question to ask what it is done to. It chose option 3 with score 7, against 4 for the next best. Its support: lesson 38, line 16: «Scorpions are arachnids whose outer shell glows blue-green under ultraviolet light; mothers carry their babies on their backs.», reached through the remembered sentence the question matched. What matched: the same doer «mothers» (+4); the same action «carry» (+3); it fills the role the question asks for (+1). Against it: the same thing acted on «babies» (-1). · the question and its options parsed, with trees and pragmatics

Test 5 · ★★ · wrong ✗

What would happen to turtle hatchlings on a beach next to a brightly lit hotel?

1. Nothing, they always find the sea by smell — no support
2. They might crawl towards the lights instead of the sea — ✓ the right answer · no support
3. They would hatch much faster in the warm light — ← Mova's choice · score 2
4. They would all become male — score 2

Why: It took the question to ask what happens next. It chose option 3 with score 2, tied with another option at 2 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 8, line 14: «Female sea turtles cross oceans to lay eggs on the beach where they hatched, probably finding it partly by sensing Earth's magnetic field, and warmer sand give…», reached through what followed the sentence the question matched. What matched: the same action «hatch» (+4). Against it: a different doer (counts against) (-2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 6 · ★★ · wrong ✗

A crocodile nest is in a sunny, very warm spot this year. What could change for the babies?

1. They will hatch with longer teeth — score 3
2. They will all be twins — score 0
3. More may become one sex than the other, as warmth decides it — ✓ the right answer · score 4
4. Nothing, warmth does not matter at all once the eggs have been laid — ← Mova's choice · score 7

Why: It took the question to ask what it is done to. It chose option 4 with score 7, against 4 for the next best. Its support: lesson 49, line 7: «In seahorses the mother puts her eggs into a pouch on the father's belly, and after a few weeks he pushes out the babies, sometimes hundreds or even over a tho…», reached through a sentence linked to the one the question matched. What matched: it fills the role the question asks for (+3); the same action «put» (+2); the same thing acted on «eggs» (+2). The right option, 3, scored 4. · the question and its options parsed, with trees and pragmatics

Test 7 · ★★ · right ✓

«why's the baby giraffe dropped on the ground, that's rough» What is the best answer?

1. The mother dropped it by mistake — no support
2. It is a test of whether the baby is strong enough to live in the wild — no support
3. The drop helps break the birth sac and start it breathing — ← Mova's choice · ✓ the right answer · score 8
4. Giraffes are born from eggs in trees — score 1

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 8, against 1 for the next best. Its support: lesson 49, line 15: «A giraffe is born with a drop of about 1.5 to 2 metres to the ground, is already about 1.8 metres tall, and usually stands within about an hour; the drop helps…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «drop» (+4); the same action «break» (+3); the same thing acted on «birth sac» (+1). · the question and its options parsed, with trees and pragmatics

Test 8 · ★★ · right ✓

«my uncle says he can hatch a chick from a supermarket egg with a heat lamp» What is right?

1. It won't work: supermarket eggs come from hens with no rooster — ← Mova's choice · ✓ the right answer · score 3
2. It works if the egg is brown — no support
3. It works after exactly 21 days — score 0
4. It works if you turn it every hour and keep it damp with warm water — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 3, against 0 for the next best. Its support: lesson 49, line 3: «If your school has an incubator, watch a chick peck its way out with the tiny hard tip on its beak after about 21 days: it is the same egg you could have had f…», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+2); the same doer «school» (+1). · the question and its options parsed, with trees and pragmatics

Test 9 · ★★ · right ✓

In a game, the kangaroo baby is born big and hops out to eat grass at once. What is wrong?

1. It is born the size of a jellybean and grows in the pouch for months — ← Mova's choice · ✓ the right answer · score 7
2. Nothing, that is right — no support
3. Kangaroo babies are born in trees — score 7
4. Kangaroos lay eggs in the pouch and the eggs hatch into baby kangaroos — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 7, tied with another option at 7 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 49, line 11: «A newborn blue whale is about 7 metres long and drinks very rich milk, often quoted at about 380 litres a day; whale babies are born live under water, usually…», reached through the remembered sentence the question matched. What matched: the same thing acted on «whale babies» (+5); the same action «bear» (+2). · the question and its options parsed, with trees and pragmatics

Test 10 · ★★ · wrong ✗

«snakes all lay eggs, easy» What is right?

1. Not all: the adder gives birth to live young — ✓ the right answer · score 6
2. Right, and so do all sharks — no support
3. No, all snakes are born live — no support
4. Right, every snake lays eggs, no exceptions — ← Mova's choice · score 7

Why: It took the question to ask which statement is true. It chose option 4 with score 7, against 6 for the next best. Its support: lesson 48, line 8: «About 12 to 16 weeks after the eggs were laid, tiny froglets leave the water; they take two or three years to become adult frogs and can also breathe through t…», reached through the remembered sentence the question matched. What matched: the same thing acted on «eggs» (+5); the same action «lay» (+2). The right option, 1, scored 6. · the question and its options parsed, with trees and pragmatics

Test 11 · ★★ · right ✓

An elephant and a mouse both give birth to live babies. Why does the elephant take so long?

1. Elephants forget they are pregnant — no support
2. It is the same time as a mouse — no support
3. A big animal with a big brain needs a long time to grow — ← Mova's choice · ✓ the right answer · score 12
4. Elephant babies sleep for most of it and so grow very slowly — score 7

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 12, against 7 for the next best. Its support: lesson 49, line 10: «An elephant carries her baby for about 22 months, longer than any other land animal, because a big animal with a big brain needs a long time to grow; the calf…», reached through the cause of the sentence the question matched. What matched: the same action «need» (+5); its «because» matches the remembered cause (+3); the same doer «big animal» (+2); the same property (+2). · the question and its options parsed, with trees and pragmatics

Test 12 · ★★ · right ✓

«human babies are just useless lol» What is the honest science?

1. Human babies are among the most helpless and need parents for years — ← Mova's choice · ✓ the right answer · score 12
2. Human babies grow up faster than any other animal on the whole planet — no support
3. Human babies need no care at all — score 3
4. Human babies can walk within an hour — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 12, against 3 for the next best. Its support: lesson 49, line 17: «A newborn human baby has about 270 to 300 bones and pieces of cartilage, many of which fuse to leave 206 in an adult, and human babies need their parents for m…», reached through the remembered sentence the question matched. What matched: the same thing acted on «parents» (+5); the same property (+3); the same action «need» (+2); the same doer «human babies» (+2). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Which of the following statements most accurately characterises the reproduction of the red kangaroo?

1. The young is hatched from an egg deposited within the pouch of the mother some weeks before — no support
2. The young is born at a size approaching that of the mother — ← Mova's choice · score 10
3. The young is reared by the father upon his feet — no support
4. The young is born minute, after a brief period, and completes its growth in the pouch — ✓ the right answer · no support

Why: It took the question to ask who or what does it. It chose option 2 with score 10, the only option with support. Its support: lesson 43, line 17: «Other mammals give birth: a hedgehog looks a bit like an echidna but has live babies, and a kangaroo gives birth to a tiny live baby that grows in its pouch.», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+5); the same doer «tiny live baby» (+4); a different action (counts against) (+1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

Identify the principal reason for which the chick of the cuckoo is fed by birds of another species.

1. Its loud begging resembles the calls of a whole brood, so the foster parents work harder — ✓ the right answer · no support
2. The foster parents recognise it as kin and choose to feed it — no support
3. The cuckoo provides food to the foster parents in exchange — no support
4. The foster parents are compelled to do so by the adult cuckoo, which watches over the nest — ← Mova's choice · score 7

Why: It took the question to ask which statement is true. It chose option 4 with score 7, the only option with support. Its support: lesson 49, line 9: «Cuckoos lay their eggs in other birds' nests; the cuckoo chick pushes the other eggs out, and its loud begging, which sounds like a whole nest of hungry chicks…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «cuckoos» (+5); the same place «nests» (+3). Against it: a different action (counts against) (-1). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · wrong ✗

Select the response consistent with the established facts concerning the seahorse.

1. The female carries the eggs within her mouth — ← Mova's choice · score 0
2. The female places her eggs in a pouch upon the male, who carries them until they hatch — ✓ the right answer · no support
3. Both parents carry the eggs alternately upon their backs until the young are able to swim — no support
4. The eggs are abandoned upon the sea floor — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 0, the only option with support. Its support: lesson 9, line 19: «In seahorses the female puts her eggs into the male's belly pouch and the father gives birth, sometimes to over a thousand babies at a time.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «female» (+1); the same thing acted on «eggs» (+1). Against it: a different action (counts against) (-2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Ascertain the period for which an elephant carries her young prior to birth.

1. Approximately four and a half years — ← Mova's choice · no support
2. Approximately nine months — no support
3. Approximately twenty-two months — ✓ the right answer · no support
4. Approximately two months — 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

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/49-babies/