ASN Sr Sec School MAYUR VIHAR-1

HOLIDAY ASSIGNMENT (2016-2017)

CLASS XII SCIENCE

English

Read the novel THE INVISIBLE MAN and attempt the assignment covering 1-10 chapters in

Literature notebook: 1. H.G. Wells has called Mrs .Hall’s guest ‘A Strange Man’ in the first chapter. Do you agree? Ch 1

2. Why does Mrs. Hall consider the stranger’s arrival in the inn as her good fortune? Ch 1

3. Do you agree that Mrs. Hall had excellent hospitality skills? Ch 1

4. What explanation did the stranger give Mrs. Hall for coming to Iping and confining to a dark room?

Ch 2

5. What seeds of suspicion did Henfrey sow in Mrs. Hall’s mind against the guest? Ch 2

6. Describe the incident when the stranger was bitten by Fearenside’s dog. Ch 3

7. What was the rummy case referred to by Teddy Henfrey when he talked to Fearenside at the little

beer-shop of Iping Hanger?ch 3

8. Why was Cuss so keen to see the stranger? Ch 4

9. Describe Cuss’s encounter with the stranger. Ch 4

10. Why did Bunting fail to capture the burglar in spite of all the presence of mind and courage? Ch 5

11. Do you find the break up at the vicarage humorous? What traits of the Buntings’ character impress

you? Ch 5

12. What took the Halls to their cellar in the early morning of Whit Monday? Why did Mr. Hall have to

rush up immediately? What did he see there? Ch 6

13. Why did Mrs. Hall faint after the furniture in the parlour strangely flew towards her? Ch 6

14. Why was Mr. Sandy Wadgers, the blacksmith sent for by the Halls early in the morning on Whit

Monday? What suggestion did he give? Ch 6

15. What inference do you draw about the stranger’s increasing casual attitude towards safeguarding his

invisibility? Discuss with reference to the furniture hurling episode when the Halls examine his

room presuming him to be absent. Ch 6

16. Describe the encounter between Mrs. Hall and the stranger when he opened the door at midday on

Whit Monday.Ch 7

17. Mr. Bobby Jaffers, the village constable was a brave man. Discuss in light of the episode when he

arrived at the inn.Ch 7

18. Bring out the element of humour in the chapter “The Unveiling of the Stranger”.Ch 7

19. What flustered and perplexed Gibbons as he lay napping in a field oblivious of all that had taken

place at the ‘Coach and Horses’ Ch 8

20. Describe Thomas Marvel’s first meeting with the Invisible Man. Ch 9

21. Why was Marvels arrival in Iping viewed with suspicion? How did Huxter in particular react? Ch

10

22. What was the purpose of Mr. Marvel’s visit to the “Coach and Horses”? Ch 10

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Chemistry

1. Make investigatory project on a topic related to the syllabus. The project must have some practical

work which you will perform in the school laboratory. The project carries 5 marks in board practical exam.

(can make in a group of two students)

2. Make a PPT or poster or slogan on Sustainable Development Goal No.9

TOPIC---- Build Resilient, Infrastructure, Promote Sustainable Industrialisation and Foster Innovation.

Roll no. 1-15 PPT

Roll no. 15–30 Poster

Roll no.-- 31 -45 Slogan.

3. Learn and Write the name reactions mechanism of reactions and tests of organic chemistry two times.

4. Complete the assignments given in the class in your assignment copy.

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Physics Discussion/PPT on -'To stabilize emissions from the aviation industry by 2020'

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Maths

Biology

Reproduction in Organisms

1. What is reproduction ?

2. What is life span ?

3. Give two examples of organisms in which budding occurs.

4. What is a clone?

5. What do you understand by the process-post fertilization events?

6. What is syngamy?

7. Name the kind of reproduction in bees in which drones are produced.

8. What are gemmules?

9. Which are the two major pre-fertilization events?

10. How does Penicillium reproduce asexually ?

11. What is the significance of sexual reproduction?

12. Give four modes of asexual reproduction.

13. What is vegetative propagation ? Give two suitable examples.

14. What is the basic difference between binary fission and budding ?

15. Coconut palm is monoecious while date palm is dioecious. Why are they called so?

16. How does yeast reproduce asexually ? Show it diagrammatically.

17. What do you understand by the term gametogenesis?

18. Distinguish between oviparous and viviparous animals.

19. Describe the significance of parthenogenesis.

20. Describe the major events in sexual reproduction.

21. Where does syngamy occur ? What is the significance of syngamy?

Sexual Reproduction in Flowering Plants.

1. What is the site of microsporogenesis?

2. What do you understand by double fertilization?

3. Name the male and female reproductive structures in the flower?

4. Define anemophily.

5. Explain the term cleistogamy.

6. What do you understand by artificial hybridisation?

7. What is apomixis?

8. Define self-incompatibility

9. Name a cultivated plant in which neither fruits nor seeds are formed.

10. List two characterstics of pollen grains that favour anemophily in plants.

11. List any three biotic agencies that bring about pollination.

12. What are parthenocarpic fruits?

13. What is emasculation? Explain its importance in hybridization.

14. Mention the various functions of tapetum.

15. Draw a sectional view of a pollen grain and label

(i) Intine (ii) Exine (iii) Gram Pore (iv) Generative Cell

16. Define triple fusion ¦what is the product of this process. What does the product develop into ?

17. Mention the characteristics of water pollinated flowers.

18. Differentiate between microsporogenesis and megasporogenesis

20. Give the origin, structure and function of the pollen tube.

21. Draw a labeled diagram of L.S. of an anatropous ovule of an angiosperm:-

(i) Nucellus (ii) Integuments (iii) Antipodal cells (iv) Secondary nucleus

22. What is double fertilization? Describe the post-fertilization changes leading to the formation of seed.

23. Briefly describe the structure of seed. Describe the importance of seeds.

Human Reproduction

1. When a male is known as sterile?

2. What is meant by regeneration?

3. Which hormone in females stimulates the production of milk during lactation.

4. How many sperms will be produced from 100 primary spermatocytes and how many eggs will be

produced from 100 primary oocytes?

5. What is the function of Leydigs cells?

6. What is spermiogenesis?

7. Name the type of placenta in mammals.

8. Name the pregnancy hormone.

9. Why is there no menstrual cycle during pregnancy?

10. Mention the role of relaxin.

11. State differences between spermatogenesis and oogenesis.

12. What is colostrums? What is the important function attributed to it?

13. Describe the formation and the function of corpus luteum.

14. What is the different stage of spermatogenesis, show these stage diagrammatially?

15. Give a labelled diagram of the sectional view of the ovary.

16. Why is the human placenta referred to as haemochorial type? Name the hormone it secretes to facilitate

parturition.

17. What is the role of the following hormone in the female reproductive cycle (i) FSH, (ii) LH, (iii)

Progesterone?

18. Describe the sequence of changes in the body of a pregnant woman upto the time of parturition.

19. Where does oogenesis takes place? Describe diagrammatically the stages of the process?

20. Draw a labelled diagram of the electron microscopic view of the mammalian sperm.

21. Describe the male accessory glands giving their functions.

22. Draw a labelled sketch of the cross section of a part of seminiferous tubule of the testes of a adult

human.

23. What is menstruation? What are the specific actions of FSH, LH, estrogen and progesterone in the

menstrual cycle?

Reproductive Health

1. What is the chemical constituent of Oral contraceptive pills?

2. Name any copper releasing IUD.

3. Name the technique used for determining the sex and condition of the foretus.

4. List two most common STDs.

5. Write the full form of the following ( i) MMR , (ii) IVF.

6. Elaborate the following abbreviation.(i)GIFT (ii) ICSI (iii) ART.

7. What is ‘Saheli”? Who prepared it?

8. List some reasons of infertility.

9. Given the causal organisms of the following STDs. (i) Syphilis (ii) Genital Herpes.

10. What is periodic abstinence?

11. What is vasectomy?

12. What are test tube babies?

13. Describe the technique by which genetic disorder in a developing foetus can be detected.

14. What do you mean by STDs? Describe Gonorrhoea and Syphilis.

15. Why medical termination of pregnancy is done. Is MTP legalized in India?

16. What is birth Control? Briefly explain the surgical methods of birth control with suitable diagram.

17. Explain various special techniques used in assisted reproduction technologies (ART).

PROJECT WORK: TOPICS

EFFECT OF LIGHT ON GERMINATION OF SEEDS

EFFECT OF TEMPERATURE ON GERMINATION OF SEEDS

EFEECT OF MICROBES ON FERMENTATION OF JUICES

COAGULABLE AND NON COAGUABLE PROTEINS OF MILK

EFFECT OF ANTIBIOTICS ON MICROBES OF MILK

NUTRIENTS PRESENT IN DRY LEAF

EXTRACTION OF PIGMENTS FROM DIFFERENT FLOWERS

NEW RESEARCH IN FIELD OF BIOLOGY

TO BE RECORDED AND SUBMITTED IN FILE

COMPLETION OF PRACTICAL FILE

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Computer Science Project Work The project has to be developed in C++ language with Object Oriented Technology and also should have use

of Data files.

Theme of the project can be

Any subsystem of a System Software or Tool

Any Scientific or a fairly complex algorithmic situation

School Management, Banking, Library Information System, Hotel or Hospital Management System,

Transport query system

Quizzes / Games

Tutor, Computer Aided Learning Systems

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Physical Education

CHAPTER-4 POSTURES

1-What do you mean by correct posture?

2-Explain the postural deformities.

3-Describe the cause of kyphosis, lordosis, scoliosis, knock-knees, bow leg and round shoulders.

4-Briefly discuss the deformities of spinal curvature.

5-Explain the causes, precautions and remedies of knock knees, Bow legs, flat foot and round

shoulder.

6-Mention the corrective exercises related to kyphosis, lordosis, scoliosis, flat foot and knock

knees.

CHAPTER-5 CHILDREN AND SPORTS:

1-Define motor development.

2-What do you mean by gross motor and fine motor development?

3-Explain weight training .Mention the advantages of weight training.

4-Elucidate the disadvantages of weight training.

5-Enumerate about the motor development in early age.

6-Explain the factors affecting motor development.

7-Elaborate the physiological benefits of exercises on children.

8-Discuss the factors affecting motor development in detail.

9-Define food supplement. Describe the precautions for taking food supplements.

10-Explain in detail the role of activities in improving the quality of life.

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Economics

1. Why production possibility curve is also called opportunity cost curve?

2. What will be the impact of recently launched ‘Clean India Mission’ on the PPC of the economy and

why?

3. Scarcity of resources is a universal phenomenon and is not confined to poor and backward countries

only. Comment.

4. A farmer is getting more profit by producing opium rather than that of wheat. in situation of famine

which crop should be produced?

5. What will likely be the impact of large scale outflow of foreign capital on PPC of the economy and

why?

6. When allocation of resources is considered as inefficient? Explain with help of PPC

7. Draw PPC and show the followings:-

(a) Full employment of resources,

(b) Underutilization of resources, and

(c) Growth of resources.

8. Using a diagram explain what will happen to the PPC of Bihar if the river kosi causes widespread

floods?

9. Why budget line is negatively sloped?

10. Why does total utility increases at diminishing rate due to continuous increase in consumption?

11. Derive the inverse relation between price of the good and its demand from single commodity

equilibrium condition “Marginal Utility = Price”.

12. By spending his entire income only on two goods X and Y a consumer finds, that MUx/Px >

MUy/Py. Explain how the consumer will react.

13. Differentiate between cardinal and ordinal utility.

14. A consumer consumes only two goods X and Y both priced at Rs. 2 per unit. If the consumer

chooses a combination of these two goods with MRS equal to 2, is the consumer in equilibrium?

Give reasons. What will a rational consumer do in this situation? Explain.

15. With the help of numerical example measure price elasticity of demand in the following conditions

by total expenditure method :

16. Demand falls when price is constant.

(a) (ii) Price falls while demand is constant.

17. Whether the following statements are true or false? Give reasons.

18. Two indifference curves never intersect each other.

(a) (ii) Income effect of inferior good is positive.

(b) (iii) Change in quantity demanded is the explanations of law of demand.

19. Explain the concept of marginal rate of substitution (MRS) by giving an example. What happens to

MRS when consumer moves downwards along the indifference curve? Give reasons for your

answer.

20. Following statements are true or false give reasons :

21. Increase in number of consumers shifts the demand curve rightward.

(a) (ii) The demand of a commodity becomes elastic if its substitute good is available in the

market.

(b) (iii) The price elasticity of demand is equal to unity at a point situated in the middle of a

straight line demand curve.

22. Give reasons for the following statements:

23. If the incomes of a consumer changes and prices of the goods remain unchanged, a new budget line

will be formed which will be parallel to the original line

24. If the income of the consumer remains unchanged and if the prices of goods X rises, intercept of the

budget line of Y-axis will remain the same, but on X-axis it will shift to the left.

25. A consumer’s equilibrium is always formed at point on the given budget line.

26. A consumer’s equilibrium will shift to a higher IC with an increase in consumer’s equilibrium

income.

27. The price elasticity of demand for goods X and Y is known to be 1 and 2 respectively. Price of X

rises by 5 percent while that of good y falls by 5 percent. What are the percentage changes in the

quantities of X and Y?

28. The price ED for good x is known to be twice that of good y. Price of x falls by 5 percent while that

of good y rises by 5 percent. What is the percentage change in quantities of x and y?

29. As a result of a in the price of a commodity from Rs. 7 per kg to Rs. 5 per kg. The total expenditure

on it increases from Rs. 3500 to Rs. 6250. Calculate the price ED.

30. If a good can be used for many purposes, the demand for it will be elastic. Why?

31. “If a product price increases, a family’s spending on the product has to increase.” Defend or refute.

32. According to law of demand by increasing the price of a good its demands decreases but in case of

petrol, its demand increases with the increase in price why?

33. Why demand for water is inelastic?

34. The demand for cooking gas is not falling in spite of regular hike in the price of cooking gas. What

will be the elasticity of demand for cooking gas? Explain giving suitable reasons in support of your

answer.

35. Differentiate between Law of Demand and Price elasticity of Demand.

36. How is price ED of a product affected by nature of the commodity and availability of closes

substitute?

37. Measure Price Elasticity of Demand on the following points of a straight line demand curve :

(a) Centre point of the demand curve.

(b) Demand curve intercepting y-axis

(c) Demand curve intercepting x-axis.

38. Which of the following commodities have inelastic demand:

(a) 1. Salt 2. A particular brand of lipstick 3. Medicines 4. Mobile phone and 5.

School uniform

39. How would you comment on the elasticity of demand when 8% decrease in price of a commodity

causes 2% increase in expenditure of the commodity?

40. The price elasticity of demand of a commodity is –0.5. At a price of Rs. 20 per unit, total

expenditure on it is Rs. 2,000. Its price is reduced by 10 percent. Calculate its demand at the reduced

price

41. A dentist was charging Rs. 300 for a standard cleaning job and per month it used to generate TR is

equal to Rs. 30,000. She has since last month increased the price of dental cleaning to Rs.350. As a

result fewer customers are now coming for dental cleaning, but the TR is now Rs. 33,250 .From this,

what can we conclude about the elasticity of demand for such a dental service?

42. A consumer buys 80 units of a good at a price of Rs. 4 per unit. When the price falls, he buys 100

units. If price elasticity of demand is (-) 1, find out the new price.

43. A 5 per cent fall in the price of X leads to a 10 per cent rise in demand for X. A 2 per cent rise in the

price of Y leads to a 6 per cent fall in demand for, Y. Calculate the price elasticity of demand of X

and Y.

44. Price of a good falls from Rs. 10 to Rs. 8. As a result its demand rises from 80 units. to 100 units.

What can you say about price elasticity of demand by total expenditure method?

45. If prices of salt and cigarettes, both rises by 10%, will the qt. demanded of both goods affected in an

equal manner?

46. A consumer spends Rs. 80 on a commodity when its price is Re. 1 per unit and spends Rs. 96 when

the price is Rs. 2 per unit. What is the price elasticity of demand for the commodity?

47. A consumer buys 40 units of a commodity at a price of Rs. 5 per unit and his price elasticity of

demand is (-) 1.5. Calculate the amount he will buy at the price of Rs. 4 per unit of the commodity.

48. A 7% fall in the price of a good leads to 49% increase in demand of that good. Find out ED.

49. ED of a good is - 3. At a price of Rs. 8 per unit a consumer buys 160 units of the good. How many

units of the good will the consumer buy when price falls to Rs. 6 per unit?

50. A household increases its demand for a commodity from 40 units to 50 units when its price falls by

10%. What is the price elasticity for the commodity?

51. A consumer buys 160 units of a good at a price of Rs 8 per unit. Price falls to Rs 6 per unit. How

much quantity will the consumer buy at the new price if the price elasticity of demand is (-)2?

52. ED of a good is - 4. When price of this good rises from Rs. 5 to Rs. 6 per unit, a consumer buys 40

units less. How many units did he buy at Rs. 5?

53. If the TP curve is a straight line through the origin, what would be the shape of the AP and MP

curves look like?

54. Complete the following table and identify the 3 phases of the law of variation proportion and explain

with reason.

(a) Unit of Variation TPP APP MPP

1 10

2 22

3 30

4 30

5 25

55. Explain the differences between :

(a) variable factors and fixed factors

(b) short period and long period

56. If diminishing marginal returns will set in after the very first unit of labor is employed? What do the

AP and MP curves look like in this case

57. Would the elasticity of demand in the following cases be unity, less than unity or greater than unity?

58. A rise in the price of a commodity increases the total household expenditure on it.

59. (ii) A rise in the price of commodity reduces total household expenditure on it.

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Home Science Prepare a report on the following activities

1) Human Development: Life Span Approach (Part II)

Activities

Identify the problems of adjustment of adolescents with the help of a tool (group activity) and make

a report.

Spend a day with an aged person and observe the needs and problems. Write a report.

List and discuss at least 4 areas of agreement and disagreement of self with:-

a) Mother b) Father

c) Siblings d) Friends

e) Teacher

Prepare a Project File

Community Development and Extension

Visit any two places (home/restaurant/school/business centre, etc.) and observe its measure for safe drinking

water and general conditions of hygiene around it.

Complete the file as per directions given in class.

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