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Thursday, December 18, 2014

NCERT SOLUTIONS- REPRODUCTION IN ANMIALS- CHAPTER 9

Q- Explain the importance of reproduction in organisms?

Ans- Reproduction is very important for the organisms because it ensures the continuity of species generation after generation.

Q- Describe the process of fertilisation in human beings?


Ans- The first step in the process of reproduction is the fusion of a sperm and an ovum. For this to happen, million of sperms from the male are transferred into the female body. The sperms swim upto the oviduct with the help of their tails and reach the egg. When they come in contact with the egg, one of the sperm may fuse with the egg. Such fusion of the egg and sperm is called fertisation. During fertilisation , the nuclei of the sperm and the egg fuse to form a single nucleus.This results in the formation of egg or zygote.

Q- Differentiate between zygote and a foetus?


Ans-   Zygote                                                                                                 foetus

It is single celled.                                                                             It is multicellular.
Zygote  is formed by the fusion                                                        foetus is formed by the repeated
of male and female gametes                                                             division of embryo and differentiation.


Q- Define asexual reproduction. Describe two methods of asexual reproduction in animals?


Ans- The type of reproduction in which only one single parent is involved is called asexual reproduction. Asexual reproduction may occur in many ways-

By budding- In hydra new individuals develop from buds. This process of asexual reproduction is called budding.

By binary fission- Amoeba reproduces by simply dividing itself into two. This type of asexual reproduction is called binary fission.

Q- In which type of female reproductive organ does the embryo get embedded.?


Ans- Uterus

Q- What is metamorphosis ? Give examples?


Ans- The drastic change that transforms a larva into  an adult is called metamorphosis. Egs- frog, silkworm, honeybee etc.

Q- Differentiate  between internal fertilisation and external fertilisation?


Internal fertilisation                            

Takes place inside the body of the female.                                  Takes place outside the body of the female.
Female lays either fertilized eggs or a complete                             female lays unfertilized egg.
individual is born.




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REPRODUCTION IN ANIMALS CHAPTER 9 CLASS 8TH

IMPORTANT KEYWORDS

Reproduction- It is the one of the important life process, which ensures the continuation of similar kinds of individuals generation after generation.

Sperms- the testes produce the male gametes called sperms.

Ova- Ovary produces females gametes called ova.

Uterus- It is the part of female reproductive system where development of embryo take place.

Fertilisation- The fusion of male gametes (sperms) and female gametes( ovum) is called fertilisation.

Zygote- During fertilisation the nuclei of the sperms and the egg are fused to form a single nucleus. This fertilised egg is called zygote.

Embroyo- The zygote divides repeatedly to give rise to a ball of cells. The cells begins to differentiate into various tissues. This developing structure is called an embryo.

Foetus-  The stage of the embryo in which all parts of the body are identifiable is known as foetus.

Bud- The outgrowth from the parent body that assumes the shape of the parent is called bud.

Binary fission-Amoeba reproduce by dividing into two. This type of asexual reproduction is called binary fission.

Sexual  reproduction- The reproduction resulting from the fusion of male gamete and female gamete is called sexual reproduction.

Internal fertilization- Fertilisation that take place inside the female body is called internal fertilisation.

External fertilisation- Fertilisation that take place outside the female body is called external fertilisation.

Oviparous- Animals which lay eggs are called oviparous.

Viviparous- Animals which give birth to young ones are called viviparous.

Budding- In this type of reproduction a bud arises from the parent body and as it matures it detaches itself from parent body to give rise to new organisms.

Metamorphosis- When a larva tranforms in adult through drastic changes is called metamorphosis.






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Tuesday, March 18, 2014

One word for HISTORY FOR SA -2

Q- Name the types of historical monuments?

Religious and secular

Q list the secular monuments?

Towers, havelis, palaces, forts, baolis

Q  List the religious monuments?

Temples and mosques

Q- A pattern on a design is called?

Motif
Q-A tall slender tower with onion shaped crown is called?

Minaret

Q- Highly decorative handwriting is called?

Calligraphy

Q- A self-supporting structure made of bricks or stone blocks and capable of carrying a superimposed load over an opening is called?

Arch
Q-A convex roof built over a building is called?

Dome
Q- Which temples constitute golden triangle of Orissa?

Bhubaneshwar, Konark, Puri
Lingaraj Temple- Bhubaneshwar
Jaganath temple- puri
Suntemple- konark

Q- What is the sun temple popularly known as?

Black pagoda

Q-Name the categories of architecture of the medieval period?

Imperial and Mughal style

Q- Which tomb ‘s architecture is mixture of Hindu and Muslim tradations of architecture?

Iltutmish’s tomb

Q- Who constructed Buland Darwaza?

Akbar

Q-  Confusion or lack of order is called?

Chaos

Q-A type of hand painted or block printed cotton textile is called?

 kalamkari

Q-The central stone of arch holding other piece in place is called?

keystone

Q-A kind of metal handicraft that originated in bidar, Karnataka in  14th century is called?

Bidriware

Q- Sun temple is located in which city?

Konark

Q- The tuglaqs mostly used  which stone for their buildings?

Grey standstone

Q-The imperial style developed under the patronage of which reign?

Sultan of Delhi

Q- What is the hall of public audience in the red ford called?

Diwan –E- Aam

Q- What is the hall of private audience is the red fort called?

Diwan- E- Khas

Q- The flowering of mughal architecture took place under which 
ruler?

Akbar

Q- Under whose reign did the building of mosque reach to its zenith?

Shah jahan

Q- Who built Vijay Stumbh?

Maharana Kumbha

Q-Name the baoli near Qutub Minar?

Gandhak ki baoli

Q- Hyderabad was founded by which ruler?

Muhammad Quli Qutub Shah

Q- Name four type of towns?

·       Founded town
·       Port town
·       Capital
·       Temple

Q- Farming in which crops are grown enough to feed a family is 
called?

Subsistence agriculture

Q- A wall built to keep out the water from entering land at lower level is called?

Dykes

Q- The practice of covering the face to conceal it from man?

Parda

Q- Practice of having more than one wife is called?

Polygamy

Q- Name the Important festival of Gonds?

Dusshera

Q- Name the first king of Ahoms?

Sukhapa

Q- Who were expert in weaving and making carpet,shawls with sheep wool?

Gaddi

Q- Which region is home to the largest number of tribal communities in India?

North east

Q- Name the caste of Gonds?

Maria

Q- The Gond tribes are well known for their unique marriage system, name it?

Ghotul

Q- Name the largest tribal group in India?

Gonds

Q- Who introduced wet rice cultivation?

Ahomes

Q- The name given to Ahom kings?

Swargadeo

Q- The Ahom and the Mughal kingdom was separated by which river?

Manas river

Q- Who crossed the Patkai Mountains and reached Brahmaputra valley?

Sukhapa

Q- The Gaddi  tribes mostly lives in which state?

Himahcal Pradesh

Q- Hindu religious movement in which devotion towards one’s god is vital is called?

Bhakti

Q- Earnest attachment to a person, cause is called?

Devotion

Q- A person who is devoted to a religion is called?

Devotee

Q- A member of an ascetic, mystical and Muslim sect?

Sufi

Q- He received spiritual training from Ramananda?

Chaitanya mahaprabhu

Q- He popularized kirtans in India?

Chaitanya mahaprabhu

Q- What is Mira Bai songs called?

Padas

Q- Which saint was a cobbler?

Ravidas

Q- The Alwar were the followers of Vishnu and were called?

Vaishnavas

Q- Moinuddin chisti’s tomb is in which city?

Ajmer

Q- Who was Pioneer of bhakti movement in India?

Ramanuja

Q- Name the birth place of prophet Muhammad?

Mecca

Q- Who was called the child of Ram and Allah?

Kabir

Q- Who established four math ?

Shankaracharya

Q- Devotees of Shiva were called?

Shivities

Q- Name the book written by Tulsi Das?

Ram charitra manas

Q- Name the Nanak’s friend and disciple?

Mardana

Q- Simple poems sung by Alwar saints is called?

Pashuras

Q- Support given to a person or organization is called?

Patronage

Q- Connected with literature works?

Literary works

Q- A school representing a particular musical type is called?

Gharanas

Q- What is the temple dancers called?

Dev dasi

Q- Name the musician of Akbar court?

Tansen

Q- The dance favored by Mughals?

Kathak

Q- What is the court language of Mughals?

Persian language

Q- Name the Jahangir’s  favorite painter?

Abul Hasan

Q- Name a famous music of Bengal?

Bowl music

Q- Who  wrote Majnu laila?

Kabir

Q- Name the renowned musician in Humayuns court?

Baiju bawara

Q- Give an example of Mughal style of art?

Tuli nama

Q- Who is the author of Ramcharitmanas?

Tulsi das

Q- A king whose action is controlled by others is called?

Puppet king

Q- The coming of an important era or event is called?

Advent

Q- To carelessly waste money and time is called?

Squandered

Q- A series of rulers of single family is called?

Dynasty

Q- Different from each other is called?

Adverse

Q- The freedom of a country or region to govern itself is called?

Autonomy

Q-  The province was also know as granary of India?

Praries

Q- Who invaded India repeatedly?

Ahamad shah abdali

Q- Name the last peshwa?

Balaji Bajirao

Q- Sikh rose revolt against leadership of which leader?

Guru Govind Singh Ji

Q- Name the first peshwa?

Balaji vishwanath

Q-The name of shivaji standing army?

Paga

Q- Shivaji excelled which fighting skills in his attacks?

Guerilla

Q- He pioneered military use of rockets in India?

Tipu sultan

Q- He carried away peacock throne and Kohinoor from India to Persia?

Nadir shah

Q- What is the religion of Ahoms?
Hinduism







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Friday, March 14, 2014

Chapter 12 Reproduction in plants

One word

Q- The instinct, which helps product of new ones to similar to parents?

   A- Survival  instinct

Q- The process by which yeast cells multiply is called?

A-Budding

Q-The process in which one cell divides into two, two into four and so on is called?

A-Binary fusion

Q- Transfer of pollen grains from anther to stigma of a pistil is called?

A- Pollination

Q-Process of fusion of male gamete with a female gamete is called?

Fertilization

Q- Name the product of fertilization?

A-Zygote

Q-Who are the carrier of pollens to different plants

A-Pollinators

Q-New organism coming from single parent is called?

A- Asexual

Q-Development of a fruit without pollination or fertilization?

A-Parthenocarphy

Q-Bryophyllum is an example of?

A-leaf buds propagation

Q-The plant which bears unisexual flowers is called?

A-papaya

Q-Food in ginger is stored in which part?

A-stem

Q-Reproduction of budding is found in which plant?

A-Yeast

Q-Pollen grains are formed in which part of plant?

A-Anther

Q- Reproduction by fragmentation is common in which plant?

A-Spirogyra

Q-Colorful and fragrant flowers with nectarines are pollinated by ?

A-Insects

Q-Fruit on a plant develops from?

A-Carpel

Q-List the various agents of dispersal of seeds?

A-Wind, animal, explosion, water.

Q-Examples of seeds which are diperssed by animals?

A-Xanthium and Urena

Q-Seeds are dispersed which are sudden jerks?

A-Castor and Balsam

Q-Mention two modes of reproduction?

A-Sexual and asexual

Q-Methods of asexual reproduction?

A-Fragmentation, budding, spore formation, vegetative propagation.

Q-Name the reproductive part of plant?

A-Flower

Q-Mention the types of pollination?

A-Self pollination and cross pollination


Q-Mention the Benefit of seed dispersal?
  • Prevent overcrowding
  • Avoid completion for sunlight,water and  minerals
  • Invade new habitats
  • A spore producing plant
  • Bread mould

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Chapter no- 14 Electric Current and its Effects

One word

Q-  A device used to break a circuit?
        
       A-  Fuse

Q- Drawing more current through a circuit?

       A-  Overloading

Q- Name the scientist  who first discovered the magnetic  effect of electric circuit?
     
        A-    Hans Christian Oersted

Q- Name the scientist who invented electric bulb for lightening purpose?
           
       A-    Thomas Alva Edison

Q- Modification of fluorescent tubes which emit still morelight with less consumption of electric energy?

      A-     CFLs

Q- Mention the name of some appliances which we make use of heating effect of electricity
  
A- Iron, electric  kettle, geyser, room heater, micro oven.

Q- Devise used to open or close a circuit?
  
  A-  Switch

Q- A material which allow electric current to pass through it?

A- Conductor

Q- A material which does not electric current to pass  through it?

A- Non conductor

Q- Coating of a conductor with non conductor of electricity?

A-  Insulation

Q- A metallic wire coated with insulating material and use for conduction of electricity?

A- Cable

Q- Why electromagnets are called temporary magnets?

A-  They are magnets only until electric current is passing through its coil. As current is switched off the electromagnet loses its magnetic property.

Q- Mention the uses of magnets and electromagnets
  • Magnets are used in toys.
  •  Doctor to take out small particles of magnetic metal like iron, nickel etc, which may have fallen in  eye, uses electromagnets.
  •   Electromagnets are used in electric fans, electric trains, electric motors etc.
  •   Electromagnets are used in radio, TVs, mobile etc.
  •   It is used in electric bell.

Q-  Mention precautions while experimenting with electricity?

  •  Never touch a light bulb with bare hands.
  • Do not touch appliances when its ON  it may cause fire.


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Sunday, March 2, 2014

CHAPTER 15 LIGHT




Q-Name the mirror which has bulged in the center and is narrow at the ends?

A-          Convex mirror

Q-Name the mirror which has a depression in the center and is thick at the edges?

A-Concave mirror

Q-Which type of lens is used as magnifying glass?

A-Convex lens

Q-Which type of lens is used in specs to view distant objects clearly?

A-Concave lens

Q-Which type of lens is used to make fire with it during daytime?

A-          Convex lens

Q-Which type of mirror is used as a reflector in a torch light?

A-          Concave  mirror

Q- Anything viewed in a mirror or through a lens is called?

A-          Image

Q-An image inverting from left to right and right to left only is called?

A-          Lateral inversion

Q-An object made from transparent material which has two or spherical surfaces?

A-          Lens

Q-A smooth, highly polished and reflecting surface is called?

A-          Mirror

Q-An arc of seven colors of light formed in sky before or after rain in the direction opposite to the position of the sun?

A-Rainbow

Q-An image which can be obtained with a screen is called?

A-Real image

Q-An image in a mirror or formed by a lens, but not obtained on a screen is called?

A-Virtual image

Q-Band of colors as in a rainbow is called?

A-Spectrum

Q-What is the ray hitting the surface called?

A-Incident ray

Q-Write short note on reflection of light?

A-          When the light hits a place shiny surface like a mirror and it bounces off the surface is called the reflection of light.

Q-Name the phenomenon which results in the formation of the rainbow?

A-          Dispersion of light

Q-When the rainbow is formed?

A-Rainbow is formed during forenoon or afternoon.

Q-Why rainbow is not formed during noon?

A-          The rainbow is not formed in noon because in the noon earth is in the direction opposite to sun, hence the rainbow on earth is not seen.

Q-Name the seven colors of the rainbow?

A-          Violet, indigo, blue, green, yellow, orange and red.

Q-What kind of image is formed when a convex lens is placed between the screen and the source of light?

  A-An inverted, real and actual image is formed.

Q-What kind of image is formed when a concave lens is held between the screen and source of light?

A-No image is formed.

Q- What things do people of weak eyesight use?

A-          Convex lens for reading purpose.
        Concave lens for viewing distant objects                 Clearly.


Q-  Which mirror is called a divergent mirror?

A- A convex mirror.

 Q- Name the mirror that forms a virtual image for object?

A -Convex Mirror.

Q2. Can u change path of light? If yes then how?

A- Yes we can. We can change the path of light  by reflecting it from a shiny and polished Surface.

Q- Explain the nature of image made in a plane mirror?
A-   Erect
      Virtual
       Same size of the  image
      At same distance from the mirror as it’s in front of the object.

Q- What type of mirror is there in the inner side and outer side  of the Spoon?
A- In  Inner surface its Concave mirror and in the outer surface its concave mirror in the spoon.

Q-Why  concave mirror called a converging mirror?

A- Concave mirror is called a converging mirror because parallel beam of lights fall on the mirror they Converge at a point name as focus.

Q- Why  convex mirror is called a diverging mirror?

A- Convex mirror is called diverging mirror because parallel beam of lights fall on it diverge or bend outward the light  after reflection.

Q- Mention the uses of concave mirror?

A- 1) concave mirrors are used by eye Specialists and dentists. 
  2.)  It is used as shaving mirror. 
  3) It is used for makeup.
  4) It is used in  car headlights and torches.

Q11. Mention  the uses of Convex mirror?

A- 1) Convex mirror is used as a rear view mirror in vehicles.
   2) It is used in metro stations to have a full view of trains.

Q-  Mention the  uses of Plane Mirror?

A- It is used for optical testing
         It is used in telescope.

Q- Mention the uses of lenses?

A- Convex lens are used as Magnifying glass
Concave lens  are used to see far off objects clearly.
Convex lens are used by  People having weak eyesight.

Q- Explain how the  the rainbow is  formed?
A- After rainfall when sun rays passes through suspended raindrops it splits into 7colours and a rainbow is formed.










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Tuesday, January 28, 2014

Chapter 11 TRANSPIRATION IN PLANTS AND ANIMALS


    ONE WORD


Q-   Name the  blood vessels, which carry pure blood?

              A-  Artery

Q- Name the blood vessels which carry impure blood?

      A-      Vein

Q- Name of the artery which carries impure blood?

         A-  Pulmonary artery

Q- Name of the artery which carries pure blood?

      A-      Pulmonary vein

Q-  Name of the muscles of heart?

         A-  Cardiac muscles

Q- Name of the vessel which carry soluble food from the leaves to different parts of a plant?

        A-       Phloem

Q- The cells which give red color to the human blood?

     A-        Red blood cells

Q- Name the red protein which gives red color to the red blood cells?

    A-          Haemoglobin

Q- Loss of water in the form of water vapor from a plant body is called?

    A-           Transpiration

Q- A fine network of arteries, which join the veins, is called?

    A-           Capillaries

Q- Name the vessels, which carry water in the plant?

   A-              Xylem

Q- Haemoglobin gives red color to?

  A-              RBCs

Q- Blood cells that help clotting of the blood are called?

 A-              Blood platelets

Q- Blood cells which are the soldiers of the body and fight against the disease germs?

 A-              WBCs

Q- Name the liquid part of the blood that hold RBCs, WBCs, platelets, and salts?

A-              Plasma

Q-Heart beats may go up to what excel while exercising?

A-              140

Q- Name two vascular tissues?

A-              Phloem
            Xylem

Q- Name which has oxygenated pure blood?

A-              Arteries

Q- Name which has carbon dioxide rich blood?

A-              Veins

Q- Process of artificial separation of waste from blood is called?

A-             Dialysis

Q- What does blood consists?

A-              Fluid, plasma, RBCs, WBCs, platelets

SHORT QUESTION AND ANSWERS

Q- Name the Products excreted by plants?

    A-Carbon dioxide
                           Excess water
                          Secretions like gum, latex,essential oils

                  
Q- What prevents the back flow of blood from the ventricles in the auricles?

A-     Because the auricles and ventricles are valves which do not allow the back flow of the blood

Q-Write short note on plasma?

A-      Pale yellow fluid with sugar is called plasma.

Q- Write short note on capillaries?

A-        These are fine blood vessels connecting arteries to veins forming a network.




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