STD 5 Basic Science: Chapter 10 Animal Lore - Questions and Answers | Let us Assess | Teaching Manual


Study Notes for Class 5 Basic Science (English Medium) അദ്ധ്യായം 10 ജന്തുവിശേഷങ്ങൾ | Text Books Solution Basic Science - Chapter 10 Animal Lore | ഈ അധ്യായത്തിന്റെ Teachers Handbook, Teaching Manual എന്നിവ ഡൗൺലോഡ് ചെയ്യാനുള്ള ലിങ്ക് ചോദ്യോത്തരങ്ങളുടെ അവസാനം നൽകിയിട്ടുണ്ട്.   
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Chapter 10: Animal Lore - Questions and Answers, Teaching Manual & Teachers Handbook
1. Look at the pictures. Identify and write down the names of those that lay eggs.
Answer:
• Peacock
• Parrot
• Ant
• Housefly
• Mosquito

2. Write the incubation period of birds.
Answer:
Birds Incubation period 
  Hen 21 days
  Pigeon 14 days
  Sparrow 14 days
  Ostrich 42 days
  Love birds  22 to 25 days

3. Classify the given organisms into egg-laying and giving birth.
Rat, Peacock, Parrot, Ant, Tortoise, Bat, Squirrel, Rabbit, Housefly, Elephant, Mosquito, Bear.
Answer:
 Egg-laying  Giving birth 
 Peacock
 Parrot
 Ant
 Tortoise
 Housefly
 Mosquito		 Rat
 Bat
 Squirrel
 Rabbit
 Elephant
 Bear

4. How is birdwatching done?
Answer: The suitable time for birdwatching is early morning and evening. It must be done from a distant place without making any sound. Binoculars may be used for this. Bird-watching can also be done by attracting birds to yards, and keeping food and water in coconut shells hung from trees.

5. What are migratory birds?
Answer: Birds that travel from one place to another at regular times often over long distances looking for favourable life situations are called migratory birds.
Eg: Paradise flycatcher, common teal, eastern golden plover, Etc.

6. Why do birds brood? (Brood: To sit on eggs to hatch them)
Answer: Birds lay eggs. The eggs need warmth (moderate heat) to hatch. So birds sit on eggs to give them enough heat.

7. Name two birds that do not brood.
Answer: Cuckoo (Lays eggs in the crow's nest). Duck

8. What things should a bird watcher observe?
Answer:
• colour, size, shape
• food and mode of procuring food
• Peculiarities of beaks and legs
• peculiarity of feathers
• mode of flight
• sound
• nests
• place where they are seen.

9. Which day is observed as a national bird-watching day?
Answer: November 12 (Dr Salim Ali was a world-famous bird watcher. November 12, his birthday, is observed as National Bird Watching Day.) 
 
10. Classification of organisms that reproduce by laying eggs is given below.
• Write the common features in each group?
Answer: They reproduce by laying eggs

• Insects are included in the first group. What about the other groups?
Answer:
Group 1 - Insects. 
Group 2 - Pisces
Group 3 - Reptiles.

11. Write the characteristics of amphibians.
Answer: 
• They can live both on land and on water 
• They lay eggs.
Eg: Frog, Salamander, Caecilian

12. Write the characteristics of reptiles.
Answer: 
• Their skin is dry and scaly.
• They lay eggs.

13. List out the organisms that are oviparous (egg-laying).
Answer: 
• Birds
• Insects. 
• Reptiles
• Amphibians

14. We can classify egg-laying animals other than birds into 3 groups.
Examples: 
• Egg-laying insects: Ant, Grasshopper, Butterfly, Moth, Beetle, Housefly, Dragonflies
• Egg-laying Pisces (Fishes): Sardine, Mackeral, Channa (Varaal), Catfish (Mushi), Gappi
• Egg-laying reptiles: Crocodile, Snake, Lizard, Mabuya (Arana), Calotes

15. Define Metamorphosis.
Answer: The young ones hatching out of the eggs of certain organisms do not resemble their parents. They are called larvae. Metamorphosis is the process by which young ones in the larva stage develop into organisms similar to their parents through different stages of growth.

16. What is a larva?
Answer: The young ones that hatch out of the eggs of some organisms are called larvae. They will not be exactly similar to their parents.
• Ant-lion is the larva of a type of dragonfly. 
• Tadpole is the larva of frog. 
• Wriggler is the larva of mosquito.

17. What are the different stages in the process of metamorphosis in organisms?
Answer: 
(1) Egg (2) Larva (3) Pupa (4) Adult 
(In frogs, the pupa stage is absent.)

18. Metamorphosis is seen mostly among:
Answer: Insects

19. Write the names of plants where butterflies lay their eggs?
Answer: Calotropis (erukku), Curry leaf plant, Citrus plant etc.

20. What are Mammals?
Answer: Mammals are creatures which give birth to young ones and feed milk.

21. Write the peculiarities of mammals.
Answer: 
• Give birth to young ones and feed milk.
• Hair on the body.
• Presence of pinna.

22. Nature of egg-laying in sea turtles.
Answer: They come out of the sea to the sandy shore. Then they dig pits in the sand and deposit eggs in the pits and cover the eggs with sand.
Animals that give birth and breast-feed (Viviparous animals)

23. Organisms that give birth to young ones and feed them milk? 
Answer: Mammals

24. Organisms that can live both on land and in water.
Answer: Amphibians

25. Five groups of organisms that lay eggs.
Answer: Birds, Insects, Reptiles, Amphibians, Fish 

26. The young ones hatching out from the eggs of some organisms don't resemble adult organisms. What are those called? 
Answer: Larvae

27. The name of the larva of mosquito. 
Answer: Wriggler

28. Examples of organisms in which metamorphosis takes place.
Answer: Frog, mosquito, butterfly

29. Which plants are grown in the butterfly garden to attract butterflies?
Answer: Calotropis, Curry leaf plant, Citrus plant

30. A flying mammal. 
Answer: Bat

31. Egg-laying mammals. 
Answer: Platypus, Echidna

32. In a particular type of snake, the eggs are hatched within its body and young ones come out from the body. It appears that the snake gives birth to young ones. Which is the snake? 
Answer: Viper

33. We have so far discussed how creatures reproduce by giving birth or laying eggs. Based on this, complete the illustration given below in your science diary.

34. Write examples for such organisms, if their body parts get cut, the severed parts grow into new organisms.
Answer: earthworm, planaria

35. Which organism is commonly known as marsupial (pouched mammal)?
Answer: Kangaroo

36. Why viper is called a Viviparous snake?
Answer: The eggs of viper hatch within the body itself. When the young
ones come out of the body, it appears that the viper gives birth to its young ones. After the young ones have come out, the viper does not take care of them.

37. Why the male sea horse seems to give birth to its young ones?
Answer: Eggs laid by female sea horses are stored in a sac seen in the abdomen of male sea horses. After 40 days, these eggs hatch and young ones come out of the sac. 

Corals
Corals are living organisms found in the sea. 

38. What are corals known as?
Answer: Corals are known as the rainforests of the sea. 

39. What is the importance of corals?
Answer: 
• Many types of sea creatures live among corals.
• Corals provide habitat to many animals.
• Corals control the turbulence of the sea ie, they keep the sea calm.
• They are used to make some medicines

40. The largest coral reef in the world?
Answer: Great Barrier Reef in Australia

41. List some human activities which lead to the destruction of biodiversity?
Answer: 
• Deforestation
• Levelling paddy fields and water bodies with mud
• Catching  fish by  mixing poison in water
• Pouching (Killing wild Animals)
• Use of pesticides in farmlands

Let us Assess
Choose the correct one
1. While classifying animals, Satheesh placed the cow, cat, elephant, bat and whale in one group. What could be the peculiarity on which this grouping is based?
A. All are terrestrial
B. Have four legs
C. Give birth to young ones
D. Have external ear.
Answer: C. Give birth to young ones

2. The young ones hatching out of eggs are not similar to their parent. This
description is suitable for which of the following creatures?
A. Dragon Fly
B Sparrow
C. Snake
D. Lizard
Answer: A. Dragon Fly

3. Hope you understand the peculiarities of different groups of organisms.
Complete this table. Analyse the table and write down the inferences.
4. “I am afraid of worms. But I like butterflies very much”. What is your
response to Raju’s statement?
Answer: Need not be afraid of worms. They are larvae of Butterflies.





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