Sunday, October 26, 2014

8th Conservation of Animals And Plants[Biodiversity] Solved

Question:  Why should we need to conserve biodiversity?                  
or, What is biodiversity ?What role does it play in an ecosystem ?

Answer:  The variety of plant and animal life in the world or in a particular habitat is called What is biodiversity.
Plants and animals depend on each other for their survival. If we disturb  any of them will affect the life of each other. Hence, we need to conserve biodiversity to maintain the balance of nature.

Question: Differentiate between the Wildlife sanctuary and biosphere reserve.

Answer:  Wildlife sanctuary it is an area within which animals are protected from possible dangers such as hunting. Their habitat is also conserved in this area. It provides protection and suitable living conditions to wild animals. Pachmarhi sanctuary is a wildlife sanctuary.
Biosphere reserve It is a large protected area constructed for the conservation of biodiversity. It helps in the conservation of various life forms such as plants, animals, and micro-organisms. Pachmarhi biosphere reserve is a popular biosphere reserve

Question:  Name the first national park of India? When it was it established?

Answer: A national park is protected land area that provide natural habitat to wild life. Jim Corbett 
National Park is the first national park of India established in 1936.

Question: What is the effect of deforestation on rainfall and climate?

Answer:  Deforestation increases temperature and wind velocity that reduce rainfall. These changes led to climate change.

Question: Why is Gahirmatha Turtle Sanctuary in Orissa famous?

Answer:   Gahirmatha is the only marine wildlife sanctuary of Orissa. Olive Ridley sea turtles migrate in huge numbers

Question: Why is Kaziranga National Park famous ?

Answer:   Kaziranga National Park a world heritage site is famous for the Great Indian one horned rhinoceros.

Question: what is the difference between biodiversity and ecosysterm?

Answer:   Biodiversity refers to the variety in the number and type of organisms found in a given habitat.
Ecosystem is a group of organisms which not only interact with each other but also with their physical environment.

Question:  What are the difference between national park and wildlife sanctuary?


National Park
Wildlife sanctuary
it protect both plants and animals
it protect only animals
Tickets or permissions are required to enter into a national park.
Tickets or permissions are not required to visit a wildlife sanctuary
A national park has a definite boundary.
A wildlife sanctuary does not have a specific boundary
Example: Jim Corbett national park (Gujarat)
Example: Krishna wildlife sanctuary (Andhra Pradesh)

Question:  What is the difference between biosphere reserves sanctuaries national parks and zoos?

Answer:  Biosphere Reserves are large areas for conservation of biodiversity, which include both wildlife and plants. 

Wildlife Sanctuary is an area which is free from disturbances from human activities, and is devoted for the conservation and protection of only wildlife. 

National Parks are those reserved areas where no human activity is allowed at all and the purpose of a national park is to preserve the plants, animals, landscape, and the historic objects of that area. 

A zoo or zoological park is a facility in which animals are confined within enclosures, displayed to the public, and in which they may also be bred.

Question:  What is conservation? How is it different from preservation?

Answer:  Conservation means controlled and sustainable use of natural resources whether they are renewable or non renewable. On the other hand preservation refers to the, attempts made to maintain in their present condition and protect them from any harm or decay.

Question:  How does deforestation reduce rainfall on the one hand and lead to floods on the other?

Answer:  When we cut trees, the water that was going to the atmosphere through transpiration is no more making clouds. so, rainfall does not occur.
The roots of the trees are able to hold water. When we cut trees, the flow of water cannot be avoided. Therefore, in this way deforestation leads to floods.

Question:  What are the possible causes of extinction of animal species?

Answer:  Causes for the extinction of species are:-
1. Sudden change in the climatic conditions due to deforestation.
2. Acid rain.
3. Diseases/epidemic.
4. Changes in the sea levels and currents.
5. Exposure to Cosmic radiations.

Question:  On what basis rare animals classified on the basis of IUCN?

Answer:  IUCN (The International Union for Conservation of Nature) is a global environmental organisation that works to conserve natural environment.
Rare species (R) of animals are classified as rare on the basis of their present and past distribution, decline in the population with course of time, abundance and quality of their natural habitat and their potential to reproduce.  Rare species have small population and are scattered in the world. For example- Golden cat.
Question:  What is flora and fauna?

Answer: The term flora is used to denote plants of a particular region or period. Similarly, the species of animals are referred to as fauna. It includes trees in the forests and grasslands as well as trees grown by humans. It includes amphibians, reptiles, mammals, small insects and worms

CBSE 8th science: "Notes and Questions Answers

8th Conservation of Plants and animals -Formative Assessment- Oral Questions - Fill in the blanks - Match the Columns - Think Zone – Puzzle /Quiz –and many more             

8th Science Power  Solution - Conservation of Plants and animals             

Conservation of Plants and Animals
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Check point [Formative Assessment]
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Science power [Solved Assessment]
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8th Conservation of Plants and Animals E-book
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8th Bio –Diversity CBSE Solved test paper -1
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8th Bio –Diversity CBSE Solved test paper -2
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Conservation of Plants and Animals   

Notes  and Solved questions           
Gist Of lesson Quick revision
Worksheet Revision before Exam
Conservation of Plants and Animals[Solved]

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Tuesday, October 7, 2014

10th Value based Questions for SA-II by JSUNIL TUTORIAL

The Board has decided to assess students for 5 percent weighting in each subject at the Summative Assessment level in Classes IX and X through questions which will be integrated with the content of the subject and analysed on the basis of the values it reflects. The questions will be for 5 marks in a question paper of 100 marks and 3-4 marks in a question paper of 70-90 marks. This will be effective from the Summative Assessments-II 2012-2013 in classes IX, X

The sample value based questions deal with the life skills and values attained by students like Self Awareness, Empathy, Critical thinking, Creative Thinking, Decision Making, Problem Solving, effective Communication, Interpersonal Relationships, Coping with Stress and Coping with Anger, and Dealing With Emotions.

Additional Support Material on Value Based Questions for the Session 2012-2013

SA – II Subject: Mathematics Class : X


Questions 1. Ram asks the labour to dig a well upto a depth of 10 metre. Labour charges Rs. 150 for first metre and Rs. 50 for each subsequent metres. As labour was uneducated, he claims Rs. 550 for the whole work. What should be the actual amount to be paid to the labours? What value of Ram is depicted in the question if he pays Rs. 600 to the labour?

2. Nidhi saves Rs. 2 on first day of the month, Rs. 4 on second day, Rs. 6 on third day and so on. What will be her saving in the month of Feb. 2012? What value is depicted by Nidhi?

3. 200 logs are stacked such that 20 logs are in the bottom row, 19 in the next row, 18 in the row next to it and so on. In how many rows are the 200 logs placed? What value is depicted in the pattern of logs?

4. How many two digit numbers are there in between 6 and 102 which are divisible by 6. Ram calculated it by using A.P. while Shyam calculated it directly. Which value is depicted by Ram?

5. In a school, students thought of planting trees in an around the school to reduce air pollution. It was decided that the number of trees, that each section of each class will plant, will be the same as the class, in which they are studying e.g. a section of class-I will plant 1 tree, a section of class II will plant 2 trees and so on till class XII. There are three sections of each class. How many trees will

be planted by the students? What value can you infer from the planting the trees?

6. Rs. 9000 were divided equally among a certain number of students. Amit was given the responsibility of dividing this amount among the students but 20 more students admitted to the school. Now each students got Rs. 160 less. Find the original number of students? What value of Amit is depicted in the question?

7. By a reduction of Rs. 2 per kg in the price of sugar, Anita can purchase 2 Kg sugar more for Rs. 224. Find the original price of sugar per kg. What value of Anita is depicted in the question?

8. CBSE 2013

9.CBSE 2013

Q.10.If all the wastes we generate is biodegradable, what effect will this have on the environment ? What value will be imbibed if people are made to understand that generation of waste should be restricted to be biodegradable only ? CBSE 2013

 a. They release CFCs that deplete ozone layer.
b. Green plants are our green lungs and water purifying systems.
c. Yes, they are trying to protect the environment.
d. Food chain is disrupted and drastic climatic changes occur. Major part of biota is lost.

Q.11.In a colony, it was decided to remove a green park and construct an air conditioned shopping mall. Children of the colony took out a march against this decision with several placards to make the colony people aware of the importance of green plants. CBSE 2013
a. What are the ill effects of air conditioners?
b. Design two placards which the children would have carried?
c. Is the action taken by the children justified?
d. How does the ecosystem get affected when plants are removed?

(a) It will lead to eco friendly environment, waste product would be converted into re-usable form.
(b) Mutual respect to health and environment conservation.

Q.14. In our society we often come across the abnormal behaviour  of people using alcohol ALCOHOL is a very useful solvent and is also used in  medicines. The people who use alcohol suffer from many diseases of liver and brain . The whole family of such people suffers.

(a) What are the harmful affects of alcohol ? How family life of drunkards suffer ?

(b) What initiatives would you take to make people aware of the harmful affects of alcohol? Write three points . 

Ans:(a) Conduct awareness programme in society, educate people and

(b )Alochol if used by people in excessive amount can cause harmful chronic diseases . The whole family suffers as the economic and social status of such people suffers.

10th Mathematics Value  Based Questions     Download File
10th Science Value  Based Questions             Download File

Value based question for Class X
courtesy:edudel nct  of Delhi

Monday, October 6, 2014

IX Value based Questions Maths ,science ,Hindi,Sanskrit and English

Value Based Questions 2014-15 and support material class IX

Value Based Support Material Class IX Mathematics

Value Based Support Material Class IX English

Value Based Support Material Class IX SCIENCE

Value Based Support Material Class IX HINDI

Value Based Support Material Class IX SANSKRIT


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Study Material For Class IX English                         

Download file     Courtesy : ZIET Chandigarh

Chapter 8 How Do Organisms Reproduce [STUDY MATERIAL FOR 10th class SLOW LEARNERS]

One mark question
Q1. Name the type of fission carried out by amoeba.       

Ans.  Binary fission.
Q2.  What is vegetative propagation?

Ans. When new plants are grown by using vegetative parts like root, stem and leaves it is known as vegetative propagation.

Q3. Name an organism which reproduces by multiple fission.

Ans. Plasmodium {malarial parasite}

Q4. What is Puberty?

Ans. The age at which the human males and females becomes sexually mature is called puberty.

Q5. What is pollination?

Ans. The transfer of pollen grains from anther to the stigma of the same or another flower of the same kind is called pollination.

Q6. What is fertilization?

Ans. The fusion of male and female gametes is called fertilization.

Q7. What is placenta?

Ans. The tissue connecting developing embryo {foetus} and mother is called placenta.

Q8. What is asexual reproduction?

Ans. The process of reproduction in which only one parent is involved and no sex cells are involved 
is called asexual reproduction.

Q9. Write the expanded form of AIDS.

Ans. Acquired Immuno deficiency Syndrome is the full form of AIDS.

Q10. Name two sexually transmitted diseases.

Ans. 1.AIDS

2. Gonorrhea

3. Syphilis

Two mark question

Q1.Name those parts of the flower which serve the same function as the following do in the animals:

1. Testes

2.  Ovary

3.  Eggs

4.  Sperms


2. Carpel

3. Ovule

4. Pollen grain

Q2. What methods will you use for growing jasmine and rose plant?

Ans. Layering method of artificial vegetative propagation can be used for growing jasmine plant. 
Stem cutting method can be used for growing rose plant.

Q3.Mention any two functions of human ovary.

Ans.1.It produces ovum the female gamete.

2. It secretes hormone estrogen.

Q4. Define menstruation.

Ans. The breakdown and removal of the inner thick and soft lining of the uterus along with its blood  vessels in the form of vaginal bleeding is called menstruation.

Q5. How the surgery methods are misused by people to prevent pregnancy?

Ans. Surgery methods are misused to prevent pregnancy. This method can be used for removal of unwanted pregnancies by people who do not want a particular child which happens in case of illegal sex selective abortion of female foetus.

Q6. What is the significance of human testes being located in the scrotum?

Ans. Scrotum protects the testes by regulating the temperature of the testes. Sperms need a 
temperature less than the body temperature for their production and development.

Q7. Questions: Name those parts of a flower which serve the same function as the following do in the animal        (i) Testis (ii) Ovary (iii) Eggs (iv) Sperms


Testis as anther

Ovary ovules present inside ovary

Eggs as eggs

Sperms as pollen grains

Q.8 Pre - natal sex determination has been prohibited by law. State two reasons.

Ans: Prenatal sex determination has been prohibited by law because of indiscriminate female foeticide. As a result of this, child sex ratio is declining at an alarming rate in some sections of our society. For a healthy society, the female-male sex ratio must be maintained.

Q.9. What is placenta ? State its any two roles during pregnancy.

Ans: The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother’s blood supply. "True" placentas are a defining characteristic of eutherian or "placental" mammals, but are also found in some snakes and lizards with varying levels of development up to mammalian levels.the following are the roles :-
(a) For nine months the placenta feeds and nourishes the fetus while also disposing of toxic waste.
(b) Without it the baby could not survive. After your baby is born, the placenta no longer serves a function.

Q10. Small piece of root tissue was taken from the rose plant and placed in a nutrient medium. Each root tissue produced a new rose plant. Name the reproductive process involved. What type of genes will be possessed by new rose plant ?

Sol. (i) This process is called tissue culture.

(ii) Genes possessed by the new plant is same as that of the parent plant.

Three marks question

Q1. (a). What is fertilization? Distinguish between external fertilization and internal fertilization.

  (b). What is the site of fertilization in human beings?

Ans.(a)  Fertilization is defined as the fusion of male and female gametes to form a zygote during a 
sexual reproduction.

 Difference between external and Internal fertilization

External fertilization
Internal fertilization
1. The fusion of male and female gametes 
occurs outside the body.
1. The fusion of gametes occurs inside the body.

2. Both individual discharge their gametes 
outside the body and development occurs 
outside the body.
2. The gametes fuse inside the female body and 
development occurs inside the body.
Example: Frogs 
Example: Birds, cattle, humans

(b)  The site of fertilization in human beings is in the fallopian tube of female reproductive system.

Q2. Give two advantages of vegetative propagation.

Ans. 1(i). Vegetative propagation is a cheaper, easier and more rapid method of propagation in plants 
than growing plants from seeds.

(ii). The characteristics of the parent plant are preserved by vegetative propagation.

Q3. Describe the surgical methods of birth control. 

Ans. The surgical method can be done in males as well as in females.

In case of males the vas deference is blocked and sperm transfer is prevented. In case of females the 
fallopian tube is blocked the egg will not be able to reach the uterus. These are permanent methods of  birth control.

Q4. Why is DNA copying an essential part of the process of reproduction?

Ans. DNA copying is an essential part of the process of reproduction because-

  1. DNA provides cellular apparatus in the daughter cells.
  2. DNA in the daughter cells will control their functioning
  3. DNA copies will retain the characters.

Q5. What could be the reasons for the adopting of contraceptive methods?

Ans. Contraceptive methods are adopted for the following reasons:
1.      For preventing unwanted pregnancies and keeping the health of women.
2.      2. To prevent the transmission of fatal diseases mechanical barrier methods are used.

Q.6. Mention any three advantages of variation in individuals.

(i) Variation helps in survival of species.
(ii) It is the basis of evolution.
(iii) It brings adaptation in individuals.

Q.7. Name the filamentous structure seen in pond. Explain how do they reproduce.

Ans:  Spirogyra have filamentous structure. They reproduce by the process of fragmentation in which they break up into smaller pieces upon maturation. These pieces grow into new individuals.

Q.8. A student noticed that an organism by mistake was cut in two parts.  After sometime both the parts developed into new individuals.
(a) Name the mode of reproduction used by the organism.
(b) State the type of cells which carry this process.
(c) Write examples of two organisms which multiply by this process.

(a) Regeneration (asexual reproduction)
(b) Specialised cells.
(c) Hydra and Planaria

Q9. Ravi took three bread slices and kept the three pieces of the slices  in the following conditions.
(i) Slice 1 in a dried and dark place.
(ii) Slice 2 in a moist and dark place.
(iii) Slice 3 in moist and in refrigerator.

What would he observe in each of the above conditions ? Give reasons for your answer ?

(i) In Slice 1, No spore will develop due to lack of  moisture.
(ii) A white cottony mass surrounded with a black mass is seen spreading on the surface of slice 2 due to formation of sporangia and spores as moisture and darkness provide favourable condition.
(iii) In slice 3, no spore will be formed as it is kept at a lower temperature in the refrigerator, which is not a favourable condition.

Q10. (i) State the function of (a) stigma (b) pollen tube.  (ii) What happens to the ovule after fertilization ?

Ans: .
(i) (a) Stigma receives pollens.
    (b) Pollen tube helps to carry the male germ cell to the female germ cell from the stigma to the ovary.

(ii) After fertilization, the ovule develops into seed.

Links For CBSE Class X Science Term-II
Carbon and Its Compounds                                  Periodic Classification of Elements of Elements

Light - Reflection and Refraction                       The Human Eye and the Colorful World

How Do Organisms Reproduce?                         Heredity and Evolution

Our Environment

Sunday, October 5, 2014

10th Biology Solved Test Paper - Heredity and Evolution with practice paper

 Chapter 9 Heredity and Evolution solved Questions for slow lerner      
Very short answer type Question
1) Name the scientist who proposed the theory of natural selection.
Ans- Charles Darwin.
2) What is micro-evolution?
Ans-Evolution on a relatively small scale
3) Write the expended form of DNA.
Ans-Doxyribo Nucleic Acid
4) Name two human traits which show variation.
Ans- Colour of eyes and height of an individual.
5) What type of reproduction give rise to more number of successful variation?
Ans- Sexual reproduction.
6) What is the basis of evolution?
Ans-Selection of variants by environmental factors forms the basis of evolution.
7) Older fossils are found closer to the surface-True or False.
Ans- False.
8) What will be the sex of a child who inherit Y Chromosome from his/her father?
Ans- The sex of the child will be boy.
9) If a trait A exists in 10% of population of an asexually reproducing species and a trait B exists in 60%  of the same population, which trait is likely to have arisen earlier?
Ans- Trait B
10) What are fossils?
Ans- Fossils are all the preserved traces or remains of living organisms of geological past.
Short Answer Type Questions (2 Marks )
1) Differentiate between homologous organs and analogous organs.Give one example of each.
Ans- Homologous organs have similar basic structure.These may look different and may perform different functions.e.g.- fore limb of man and flipper of a whale.
Analogous organs have different basic structure.These look alike and perform same functions.e.g.- wings of birds and wings of insects.
2) How the study of fossil is considered significant?
Ans- The study of fossil is considered significant because-
        (i) Fossils provide direct evidence of past life.
        (ii) These provide convincing proof of organic evolution.
3)  How will you determine the age of fossils?
Ans- The age of fossils can be determined by two ways-
        (i) If we dig into the earth and start finding fossils, it can be assumed that the fissils closer to the surface are more recent to those found in deeper layers.
        (ii) By detecting the ratio of different isotopes of the same element in the fossil materials.
4) How does the creation of variations in a species ensure survival?
Ans- The creation of variations in a species enable them to adopt according to the changes and the new needs. Thus, they will enable the survival of the species.
5) Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
Ans- No, the wing oe a butterfly and the wing of a bat cannot be considered homologous organs they have a common function for flyig but their origin and structure  are not common . So they are analogous organ.
6) Will geographical isolation be a major factor in  the speciation of a self-pollinating plant species? Why or why not?
Ans- No, because, new genes do not enter in the population and no species is formed.Hence, there is a little variation possible.
7) Explain the importance of fossils in deciding evolutionary relationships.
Ans- Fossils and their study is useful in knowing about the species which are no longer alive. They provide evidence and missing links between two classes. They are helpful in forming a sequence of organisms in the pathway of evolution.
Thus, fossils have an importance in deciding evolutionary relationships.
8) How does Mendel’s experiment show that traits may be dominant or recessive?      
Ans- Mendel selected and crossed tall pea plant with dwarf pea plant . The F1 progeny had Tt genotype but the plant was tall. This shows that T is dominant and t is recessive.
(9) Dead remains of two organisms A and B were buried. Later , only B's fossils were found , but not A's. Give reasons
Ans: Animal A must not have got preserved or must have have got fully decomposed by the process of anaerobic bacteria. The other reason could be that it must have moved away to some other places by the action of wind or rains etc.
10) Do all variations in a particular species have equal chances of survival in an environment?
Ans: No, all variations in a particular species do not have equal chances for survival. The variations which are beneficial for the species, that is, which help in the better survival of the species have a better survival as compared to the other variations.

Short Answer Type Questions (3Marks)
1) How is the sex of a new born individual determined?
Ans- Sex is deternined at the time of fertilisation. A human male  has XY sex chromosome and produces two types of  sperms, either with X- chromosome or with Y- chromosome.
A human female has XX- chromosome and produce ova of one type. If the sperm containing X chromosome fuses with ovum , the individual will be girl and the sperm containing Y chromosome fuses with ovum, the individual will be boy.

2) What is sex chromosome? Name the two types of sex chromosomes. Mention the chromosomes present in male and female .
Ans-  The chromosome which determine the sex of a person are called sex chromosome.
The two types of sex chromosomes are X chromosome and Y chromosome.
Sex chromosomes in male -- XY 
Sex chromosomes in females -- XX.
3) Explain with an example how traits get expressed?
 Ans- Gene is made up of a segment of DNA which provide information for protein. Protein is needed for biochemical process. If the proteins work efficiently,the traits get expressed in better way.
For erxample, the plant height depends onthe amount of growth hormone released by protein. If the protein is efficient more growth hormone will be released and plant will be taller.But tf the protein in inefficient the plant will be shorter.  Thus, genes control the traits.
4)     Describe the human evolution.
Ans- All human beings belong to a single species that evolved in Africa.
Few thosand years ago some ancestors left Africa while other stayed back.
The residents spread across Africa and the migrants spread acrossthe planet from Africa to West Asia , Central Asia,
Eurasia, South asia, Indonesia,  Australia and America.
They went forwards and backwards with groups separating from each other, or sometime comong together.
Like all other vspecies, they  were also living their lives to the best of thiir ability.
5) Discuss law of segregation or purity of gametes.      
Ans- Both factors or traits are present in pairs and during gamet formation, the two factors segregate and one gamete is pure for one character only.After fertilization one trait from male and other trait from female fuses to restore the paired feature in zygote.
6) What is speciation? How it occurs?
Ans- Origin of new species from existing one, is called speciation. It nay occur due to the following reasons-         Due to mutation  Due to natural selection.
7) Why are traits acquired during the lifetime of an individual not inherited?
Ans- Only the traits which are passed on to the DNA of germ cells are inheritedto the progeny of the organisms reproducing sexually. Traits acquired during lifetime do not pass on to the DNA of germ cells and they are not inherited.
8) Who was Mendel? Why was he called the father of ganetics?
Ans- Gregor Johann Mendel was an Australian geneticist. he sowed the garden pea and fond flowers of different colours.He formulated the law of heredity by his experiments. His law gave the base for futher study of genetics. Threrfore, he was called the father of Genetics.
9).(a) Why Mendel selected garden pea plant for his experiments. List a reason
(b)What are recessive and dominant genes?
Ans- (a) Mendel selected garden pea plant for his experiments as these can be self pollinated.
 (b) Recessive genes are not able to express but dominating genes express
10) What is genetics? State any two factors that could lead to the rise of new species.
Ans: Genetics is a field of biology that deals with the study of genes, heredity and variation of different organisms.

Two factors that could give rise to new species  includes:
1. Geographical isolation of individuals of a particular population into two or more groups.
2. Genetic drift.

11) When is a recessive trait capable of expressing itself? Write its expression with respect to height of plant (Genotype).

Ans: A recessive trait can be defined as the trait which is expressed only when the recessive alleles are present in a homozygous condition, which means that the individual has both the alleles as recessive alleles.
In pea plant, short plant height is the recessive trait. It is expressed when the individual plant has both the alleles as 't'. So the genotype of a plant with short height will be tt.
12) When a pesticide is sprayed on a population of insects,all insects do not get killed but few of them survive. Give reason.

Ans When a pesticide is sprayed on a field most of the insects are killed because they are sensitive to the pesticide. A few of the insects survive because they have variations which made them resistant against the pesticide, such that the pesticide has no effect on these insects.