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West Bengal Board Model Questions & Answers : Class-12 Life Science

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West Bengal Board Model Questions & Answers : Class-12

 

Exam Name :  West Bengal Board Model Questions & Answers

Subject :  Life Science (Sample Paper's I,II & III )

Class : 12th 

 

Model Question Biology 3

Sankari Prasad Bhattacharyay

Ballygunj  Govt. High School

Group ‘A’

Q1.      Answer the following questions :  (Alternatives are to be noted)        2 x 7 = 14

(a)            State two differences between tracheid & trachea.

Ans.

Tracheid                                            Trachea

1.

Structure

1.

Presence of all types of

1.

Presence of all types of

 

 

 

thickening except

 

thickening including

 

 

 

bordered pits.

 

bordered pits.

2.

Function

2.

Major  conducting   xylem

2.

Major     conducting      xylem

 

 

 

element of non−flowering

 

plants.

 

elements of flowering plants.

(b)       State two differences between the vascular bundle of Root and Stem.

Ans.

Vascular bundle of stem                Vascular bundle of root

1.

Number

1.

Many vesicular bundle

 

arranged in a ring in dicot

1.

Number of vascular bundles

 

and less i.e. 2 − 5 in number

 

 

 

stem.

 

in Dicot root.

 

 

 

Numbers vascular

 

The vascular bundles are 6 −

 

 

 

bundles are scattered in

 

the ground tissue in

 

8 in number in monocot root.

 

 

 

monocot stem.

 

 

2.

Types

2.

Conjoint, collateral or

2.

Radial, closed

 

 

 

bicollateral

 

 

(c)       State two differences between Penaeid & Non penaeid Prawn.

 

Ans.                Peneid                                     Non−peneid

 

Habitat        1.      Saline Water prawn             1.    Fresh water prawn

 

Structure     2.      The  first  three  thoracic legs are chelate

Ex − Penacus indicus                                       Ex − Macrobrachium rosen burgii

 

OR      Write the scientific names of two Pearl oysters.

 

Ans :

1.

Pinctada fucata

 

2.

Pinctada atropurpurea

(d)       Write one symptom each of Flacherie & Muscardine of silkworm.

Ans :  1.     Flacherie :  (i) The body of the larva becomes soft and black.

2.    Muscardiine :  (i)  The body of the larva becomes stiff and is covered with powdery white material.

 

(e)       State the name of four abnormal composition of urine.

Ans :  (i) Blood, (ii) Pus Cells, (iii) Protein (albumin)     (iv) Ketone bodies.

OR      State the role of skin in excretion.

Ans :  (i)         The skin excretes    water, salts,    uric acid etc.    through sweat and irreversible respiration.

(ii)        The  skin  excretes  waxes,  hydrocarbons,  cholesterol  etc.  through  sebum. Hence  the skin is called accessory excretory organ.

 

(f)        Write the now of four hormones secreted from placenta.

Ans :  (1)  Human chronic gonadotrophin (HCG)     (2)  Estrogen  (3)  Progesterone

 

(4) Placental prolactic.

OR      State the one function each of somatostation & Prostaglandin.

Ans :  (1)    Somatostaion −    It  inhibits the secretion of insulin and glucagon from the pancreatic islets.

(2)       Prostaglandins − Inhibit gastric acid secretion and formation of peptic ulcer.

   

Courtesy: West Bengal Board

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West Bengal Board Model Questions & Answers : Class-12 Statistics

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West Bengal Board Model Questions & Answers : Class-12

water crises1

 

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West Bengal Board Model Questions & Answers : Class-12 English

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West Bengal Board Model Questions & Answers : Class-12

 

Exam Name :  West Bengal Board Model Questions & Answers

Subject :  English (Sample Paper's I,II,III & IV )

Class : 12th 

Model Question English − 1
 
(Ajay Kumar Chakraborti, Ballygunge Govt. High School, Kolkata)
 
1. Complete each of the sentences which follow by choosing the correct answer from the alternatives given : 1 x 4 = 4
 
(i) “The young lady stepped close to the expert”
___ The ‘young lady’ was
(a) Miss Bennet
(b) Miss Smith
(c) Miss Sullivan
(d) Miss Raby
Ans: (b) Miss Smith
 
(ii) The man who was sitting on the bench near the writer was a
(a) cotton merchant
(b) tobacco merchant
(c) hide merchant
(d) wheat merchant
Ans: (b) tobacco merchant
 
2. Answer the questions which follow (each in about 30 words)          3
 
“The idea originated with Ram Saran”
___ What was the idea and how was it carried out ?
Ans: The ‘idea’ was to establish a school for the children of workmen and of the lowly−paid railway staff at Mokameh Ghat.
        It was carried out by renting a hut for twenty odd students, appointing a master who had to tactfully overcome the initial hurdle of caste prejudices.
 
3. Answer the question which follow (in about 50 words) :                    5
 
Q. What were the Christmas Day celebrations at Mokameh Ghat ?
 
Ans: The Christmas Day celebration was a big affair at Mokameh Ghat. On that day Ram Saran and his workmen would decorate the office with signal flags and flowers. Sharp at ten in the morning Ram Saran, colourfully attired, would fetch Corbett to the place. The programme would start with the garlanding of Corbett followed by a long speech of Ram Saran and a short one by Corbett. Subsequently, sweet would be distributed among the children. The celebration would conclude with the distribution of cash bonus to Ram Saran and his

   

Courtesy: West Bengal Board

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West Bengal Board Model Questions & Answers : Class-12 Bengali

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West Bengal Board Model Questions & Answers : Class-12

 

Exam Name :  West Bengal Board Model Questions & Answers

Subject :  Bengali

Class : 12th 

   

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West Bengal Board Model Questions & Answers : Class-10 Mathematics

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West Bengal Board Model Questions & Answers : Class-10

 

Exam Name :  West Bengal Board Model Questions & Answers

Subject : Mathematics Part-I Eng & Bengali Language

    Mathematics Part-II Ben Language

    Mathematics Oral ben Language

 

Courtesy: West Bengal Board

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West Bengal Board Model Questions & Answers : Class-10 English

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West Bengal Board Model Questions & Answers : Class-10

Model Questions and Answers for English (Second Language) – Part I

 

(All answers have been provided by Subhajit Ghosh, a student of Class XI, Paharhati Golapmani

High School. Memary, Burdwan.  He secured the 8th  rank in Madhyamik 2008 scoring 795/800.)

1.   Read the following Unit and do the tasks that follow :

1.   His resentment against the animal began to show when others started admiring it. He suspected that they found it better looking than its owner. Two days later when I called at the house, I found his mother looking very upset. She told me how Suresh in a sudden and uncontrollable rage, had thrown a brick at the kid, breaking its skull.

2.   “I’ll talk to him”, I said and went out looking for him. I found him near the stream, lying flat on his belly in the soft mud, chasing tadpoles with a stick.

        3.   “Why did you kill the goat?”, I asked. He shrugged his shoulders.

        4.   “How very cruel!”, I said.

5.   He took a pen-knife from his shirt pocket and held it out to me by the blade. He pointed to his bare stomach and motioned me to thrust the blade into his belly.

6.   “You are a funny fellow”, I said, taking the knife and throwing it into the stream. “Come, let’s have a swim”. We swam all afternoon and Suresh went home smiling.

(a)  Supply the information in the following sentences:                                                 1x3=3

(i)   His resentment against the animal began to show.

Here the animal is a ..........................                                           

Ans: Kid (goat)

(ii)  I found him near the stream.

Here ‘I’ refers to ...........................                                                  

Ans: narrator, Ruskin Bond himself

(iii) ……………….. and held ‘it’ out to me…………………… Here it refers to................................       

Ans: pen knife which Suresh had taken out from his shirt pocket

 

(b) Pick out appropriate statements from the text to match the following functions.

1x3=3

(i)   Asking for explanation                                                                             

Ans: “Why did you kill the goat”, I asked.

(ii)  Expressing disgust                                                                            

Ans: “How very cruel”, I said.

(iii) Making a comment on a person                                                                             

Ans: You are a funny fellow.

(c)  Pick out relevant sentences from the text to justify that the following statements are true       1x2=2

(i)  The other could, at, last, make Suresh Happy.

 

Ans: ‘We swam all afternoon and Suresh went home smiling.’

 

Click Here to Download Part I

Model Questions and Answers for English (Second Language) – Part II

 

(All answers have been provided by Sukanya Dasgupta, Assistant Teacher, Jadavpur Vidyapith)

1.   Read the following passage and answer the question set below:

Surprisingly,  Salim  Ali  had  no  university  degree.  Although  he  joined  college,  his  intense  dislike  for mathematics did not allow him to continue his studies. He left for Burma to help his brother in his farm. But here again he proved a failure. In the jungles of Burma he looked for birds instead of animals.

When he returned home he did a course in zoology and was appointed a guide at the museum of the

Bombay Natural History Society. But, for lack of funds his post in the museum was abolished.

He spent his life threading his way through the obscure regions of the Indian subcontinent, discovering, studying and identifying about 300 birds in the Indian region.

One of his most noted theories is that birds have their own language. In fact, they communicate with each other through simple sounds and actions. Moreover, birds react in their own particular way to threat, pleasure and pain. But according to him the structure of the bird’s brain suggests a comparatively low level of intelligence and there is no possibility of regular conversation as we know it.

However, says Dr. Ali, the best talker among the Indian birds is the Hill Myna whose articulation of the human voice is clearer than even the parrot. The best songsters are the Greywinged Blackbird and the Malabar Whistling Thrush.

Salim Ali was a married man and badly needed a job. But the best he could hope for was a clerk’s post and that would leave him little time to pursue his interest in birds. Luckily, his wife had a small income and could support him. They moved to a small house at Kihim, across the harbour.

(a)  Rearrange the sentences in their proper order. Put the numbers in the boxes                                5

(i)   His post was abolished.

(ii)  Salim Ali joined college.

(iii) He left for Burma.

(iv) His strong dislike for mathematics made him leave the college.

(v)  He was appointed a guide at the museum of the Bombay History Society. Ans:

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Courtesy: West Bengal Board

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