Class XII

Holiday Home Work

Accountancy

Project

Collect the following data of the company allotted to you:

Name of the chairman

Address of the registered office

Brief history

Products Manufactured

Income and Position Statement

Future Projections

Revise questions of Issue of shares

Business Studies

Project on Principles of Management and Business environment as discussed in class

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iii) Animal species are estimated to be about _____________percent of all species while

plants comprise about _______________ percent.

iv) Among animals ____________ group of animals are most abundant whereas

______________among plants dominate the group.

v) India has ____________percent of global species diversity.

vi) It is estimated that _______________plant species &______________ animal species are

yet to be discovered and described.

vii) Species diversity ________________as are more away from equator towards the poles.

viii) The greatest biodiversity on earth is found in________________.

Q2- Give 3 hypothesis for explaining why tropics show greatest levels of species richness.

Q3- What is the significance of the scope of regression in a species ______area relationship?

Q4- What are the consequences of loss of biodiversity in a region?

Q5- What are the major causes of species losses in a geographical region?

Q6- What do you understand by biodiversity hotspots? Name the total number of hotspots in

world? How many of these are in India? Give their location.

Q7- What are sacred groves? What is their role in conservation?

Q8- Among the ecosystem services, are control of floods & soil erosion. Howe is their

achieved by biotic components of the ecosystem?

Q9- Give a short note on

a) In situ conservation b) Ex situ conservation

Q10- Name the organizations/summits set up worldwide to save biodiversity.

Class - XII

CHAPTER NO 13

ORGANISMS & POPULATION

Q1- Enlist the conditions which lead to formation of major biomes.

Q2- What do you understand by Organismic Ecology?

Q3-i) Temperature decreases progressively from equator towards _____________and from

plains to _________________.

ii) In habitats such as ______________and ___________ average temperature exceeds

100C.

iii) Those organism which can tolerate & thrive in a wide range of temperature are called

___________whereas ____________organisms are restricted to a narrow range of

temperatures.

iv) Euryhaline organisms are________________.

v) Stenohaline organisms are _______________.

vi) Define Homeostasis

Q4- Give reasons behind successful survival of mammals over the years.

Q5- Differentiate between Regulators and Conformers.

Q6-i) Give equations for population density at time t+1

ii) State Allens Rule

iii) What is altitude sickness? Adaptation

iv) Define Population.

Q7- List the characteristics that populations posses but not individuals.

Q8- List the various ways of estimating population size.

Q9- How is dipause different from hibernation?

Q10- Write short notes on

i) Adaptations in desert plants and animals.

ii) Adaptations of plants to water scarcity.

iii) Behavioural adaptations in animals.

iv) Importance of light to plants.

v) Effect of temperature or water scarcity & the adaptations of animals.

Q11- List various abiotic environmental factors.

Q12- What is exponential growth? What factors govern the exponential growth of a

population?

Q13-i) Why is Logistic Growth Model is considered a more realistic one to explain growth in

population.

ii) How does it differ from Exponential Growth Model? Elaborate.

Q14- What do you understand by Darwinian fitness?

Q15- Name important define mechanisms in plant against herbivory.

Q16-i) Give some examples of Biological Control in nature.

ii) State Gauses Competitive exclusion Principle.

Q17- Define the following terms and give one example of

a) Commensalism

b) Mutualism

c) Camouflage

d) Parasitism

e) Inter specific competition

Q18-i) What is brood parasitism?

ii) Define Amensalism

iii) Give various examples of commensalism.

Q19- Discuss the phenomenon of Co-evolution in context of flower and its pollinator.

Q20- Differentiate between Population and Community.

Class XII

CHAPTER NO 16

ENVOIRMENTAL ISSUES

Q1- What do you understand by Pollution?

Q2- List the effects of atmospheric pollution on plants and human beings. Describe control

measures to check atmospheric pollution.

Q3- Give role of catalytic converters in reducing atmospheric pollution.

Q4- What measures were taken by Delhi Govt. to control vehicular pollution?

Q5- What are the causes of water pollution?

Q6- Give details of effects of water pollution & control measures.

Q7- Explain

a) Biomagnification b) Eutrophication c) Cultural eutrophication.

Q8-i) What are Ecosan toilets?

ii) How can solid waste generation be reduced?

iii) Suggest an alternative use of plastic waste.

iv) How can e-waste be handled?

Q9- The most outstanding danger today is the radioactive fallout. Comment

Q10- Write a short note on Green house effect & Global warming.

Q11- Describe the significance of ozone layer. What are the causes of its thinning?

Q12- Discuss UV-B.

Q13- Give cause of deforestation. What are its consequences?

Q14- Discuss role of women & communities in protection & conservation of forests.

Q15- What are the benefits of organic farming?

Class - 12 A &B(Chemistry)

Holiday Homework

1. Solve all the questions (Intext, Examples and NCERT Exercises) of Alkyl Halides and Aryl Halides.

2. Investigatory Projects

Topic- To study the casein quantity in different samples of

milk.(Commercial).

Topic-Comparative analysis of the effectiveness of different

antacids.

Topic- Preparation of soya bean milk and its comparison

with natural milk with respect to curd formation.

Topic-To detect the presence of caffeine in different samples of

tea.

Topic- To detect the presence of food adulterants in fat oil, butter,

redchilly, pepper and two more.

Topic- Preparation of soap and the foaming capacities of different

samples of soap.

Computer

Holiday HomeWork Class 12

Any Five:

Question 1 Define a class student with the following specification

Private members of class student

admno integer

sname 20 character

eng. math, science float

total float

ctotal() a function to calculate eng + math + science with float return

type.

Public member function of class student

Takedata() Function to accept values for admno, sname, eng, science and

invoke ctotal() to calculate total.

Showdata() Function to display all the data members on the screen.

Question 2 Define a class batsman with the following specifications:

Private members: bcode 4 digits code number

bname 20 characters

innings, notout, runs integer type

batavg it is calculated according to the formula

batavg =runs/(innings-notout)

calcavg() Function to compute batavg

Public members: readdata() Function to accept value from bcode, name, innings, notout

and invoke the function calcavg()

displaydata() Function to display the data members on the screen

Question 3 Define a class TEST in C++ with following description:

Private Members TestCode of type integer

Description of type string

NoCandidate of type integer

CenterReqd (number of centers required) of type integer

A member function CALCNTR() to calculate and return the number of centers as

(NoCandidates/100+1)

Public Members

- A function SCHEDULE() to allow user to enter values for TestCode, Description,

NoCandidate & call function CALCNTR() to calculate the number of Centres

- A function D