Aquatic Animals

 

Lesson 11

Aquatic Animals

 

1. Answer the following questions (নিম্নলিখিত প্রশ্নগুলির উত্তর দাও):-

(i) Which animals are called aquatic animals?

Ans:- The animals that live in water are called aquatic animals .

 

(ii) Where do fishes live?

Ans:- Fishes live in water .

 

(iii) How do fishes breathe in water?

Ans:- Fishes breathe in water with the help of their gills .

 

(iv) Name two fish that live in saline water.

Ans:- Hilsa and Pomfret live in saline water .

 

(v) Which fish eats larva of mosquitoes?

Ans:- A fish called Guppy eats the larva of mosquitoes .

 

(vi) How many parts does a prawn's body have and what are they ?

Ans:- The prawn's body has three parts: the head, the thorax and the abdomen .

 

(vii) Where does a frog live?

Ans:- A frog lives in water and also on land .

 

(viii) Which body parts help the frog to jump?

Ans:- The hind folded legs of frog help to jump .

 

2. Put tick (✓) marks and cross (X) marks in the boxes according to the information given in the text (পাঠ্যপুস্তকের তথ্য অনুযায়ী সত্য হলে (✓) এবং মিথ্যা হলে (X) লেখো):-

Ans:-

	Has scales	Lives in water	Eats worm	Has bones
Fish	✓	✓	✓	X
Prawn	X	✓	✓	X
Crab	X	✓	✓	X
Frog	X	✓	✓	✓

 

3. Complete the following sentences (বাক্যগুলি সম্পূর্ণ করো):-

Ans:-

(i) Fishes breathe in water with the help of their gills .

(ii) Three main parts of a prawn's body are head, thorax and the abdomen .

(iii) The head of a prawn has antenna and two eyes .

(iv) The crab pinches with its pincers .

(v) The skin of a frog is rough and moist .

 

4. Write the meaning of the following words (নীচের শব্দগুলির অর্থ লেখো):-

Ans:-

Pool - ডোবা ।

Aquatic - জলচর ।

Gill - ফুলকা ।

Saline - লবণ জল ।

Mosquito - মশা ।

 

5. Write the opposite of the following words (নীচের শব্দগুলির বিপরীত শব্দ লেখো):-

Ans:-

Love - Hate,

Hard - Soft,

Saline - Sweet,

Head - Leg,

Big - Small .

 

6. Use words from the help box and write five sentences about fish (নীচে দেওয়া শব্দগুলির সাহায্যে মাছের ওপর পাঁচটি বাক্য লেখো):-

[ Help Box : fins, gills, scales, tail, eyes, water, worms ]

Ans:-                           About fish

Fishes live in water.

They have two eyes and they also have fins.

Their body is covered with scales.

The fishes breathe in water with the help of their gills.

The fishes has a hard tail, it's help to changes direction.

Fishes live on worms.

 

7. Choose the correct alternatives (সঠিক উত্তরের ওপর দাগ দাও):-

Ans:-

(i) Fishes breathe with their lungs / gills.

(ii) Hilsa and pomfret live in sweet / saline water.

(iii) Prawns are fish / insects.

(iv) A prawn's body has three / four parts.

(v) A frog's hind legs are always open / folded.

 

8. Match and write 5 sentences about prawns (নীচের বাক্সে দেওয়া শব্দগুলি মেলাও এবং সঠিক বাক্য বানাও):-

Ans:-

Prawns live in water.

Prawns swim very fast in water.

Prawns are not fish.

Prawns have no backbone.

Prawns are insects.

 

9. Match and write five sentences about frogs (নীচের বাক্সে দেওয়া শব্দগুলি ঠিকমতো মিলিয়ে বাক্য বানাও):-

Ans:-

Frogs have rough and moist skin.

Frogs live in water and also on land.

Frogs eat only insects.

Frogs swim with the help of their webbed feet.

Frogs jump with the help of their folded legs.

 

10. Make a list of some aquatic animals (জলচর প্রাণীর একটি তালিকা বানাও):-

Ans:-

Fish,

Prawn,

Crab,

Frog .

 

11. Write 5 sentences about an aquatic animal (জলচর প্রাণীর ওপর পাঁচটি বাক্য লেখো):-

Ans:-                An aquatic animal

(i) The whale is the largest aquatic animal.

(ii) Whales are mammals.

(iii) Whales do not have hairs on their body.

(iv) Whales are carnivorous animals and eat small fishes, and other sea animals.

(v) Whale’s mouth can be opened as wide as 25 feet.