NCERT Class 10 Science Chapter 8 How do Organisms Reproduce Extra Questions and Answers
Class 10 Science Chapter 8 Extra Inside Questions and Answers – How do Organisms Reproduce. Here in this Page Class X Students can Learn Extra Questions & Answer 8th Chapter Science fully Inside.
We Provided Here How do Organisms Reproduce Science Chapter 8 Long Answer Type Question, Multiple Choice Questions & Answer, Short Answer Type Questions (2 or 3 marks), and Very Short answer Type Question (1 marks) Solution.
Class 10 Science Chapter 8 Extra Question with Answer – How do Organisms Reproduce
Science Chapter 8 How do Organisms Reproduce Class 10 Inside 5 Marks, 3 marks, 2 Marks & And 1 Marks Important Questions and Answers.
Que.1) Attempt the following multiple choice question:
1.) A basic event in reproduction of an organism is the creation of a …………………copy.
a.) DNA
b.) RNA
c.) Proteins
d.) Lipids
Ans. a. DNA
Hint: Firstly DNA should be copied be copied for an organism to undergo the process of reproduction.
2.) Leishmania causes…………………….
a.) Neela- azar
b.) kala-azar
c.) hara- azar
d.) peela- azar
ans b kala-azar
Hint: kala- azar is caused by Leishmania.
3.) The reproductive parts of angiosperms are located in……………………………..
a.) Leaf
b.) Stem
c.) Flower
d.) Stem
Ans. c. Flower
Hint: flower is the reproductive organ of plant body hence it consists of reproductive parts.
4.) Menstruation usually lasts for about ……………………….days.
a.) three to five
b.) two to nine
c.) one to eight
d.) two to eight
ans. d. Two to eight
6.) Fertilisation occurs in the …………………………………….
a) Ovary
b) Cervix
c) Fallopian tube
d) Vagina
Ans. c. fallopian tube
Hint: fallopian tube is the location where fertilization occurs.
7.) ……………………………………….is not a bisexual flower.
a) Hibiscus,
b) mustard,
c) rose
d) papaya
ans. d. Papaya
Hint: all are bisexual flowers except papaya.
8.) pollen grains are …………………………….. in colour.
a) Whitish
b) Pinkish
c) Reddish
d) Yellowish
Ans. d. Yellowish
Hint: pollen grains mostly looks yellowish in colour.
Que. 2) Very short answer questions:
1.) Name the male gamete in angiospemic plants.
Ans. pollen/ pollen grains are the male gametes produced by angiospermic plants.
2.) Name the reproductive whorls in flower?
Ans. Stamens and pistil are the reproductive whorls in a flower.
3.) name the male reproductive part of the angiospermic flower.
Ans. Stamen is the male reproductive part of the angiospermic flower.
4.) What does stamen produces?
Ans. stamen produces pollen grains in it.
5.) Name the female reproductive part of the angiospermic pant.
Ans. Pistil is the female reproductive part of the angiospermic plant.
6.) Name the three parts of pistil.
Ans. stigma, style and ovary are the three parts of pistil.
7.) What does an ovary contains?
Ans. An ovary contains ovules in it.
In case you are missed :- Previous Chapter Extra Questions
8.) What is the function of petals and sepals ?
Ans. petals and sepals are the non- reproductive whorls of the flower. They protects the flower when it is in bud condition.
Que. 3) Give answers of the following:
1.) What is germination?
Ans. a mature embryo germinates and develops into a seedling under suitable environmental condition is known as germination.
2.) What is mean by unisexual flower? Give suitable example.
Ans. when a flower contains either stamens or pistil in it is called as unisexual flower.
Ex- papaya, watermelon
3.) What is mean by bisexual flower? Give suitable example
Ans. when a flower contains both stamens and pistil in it is called as bisexual flower.
Ex- Hibiscus, mustard, rose, etc.
4.) Explain the reproduction in Spirogyra?
Ans. Spirogyra reproduces by simply breaking up into smaller pieces upon maturation. And then, each pieces or fragments grow into new individuals.
5.) What is mean by regeneration? Name the organisms which shows the property of regeneration?
Ans. regeneration is the ability to give rise to new individual organisms from their cut body parts. Hydra and Planaria show this property of regeneration.
Long Type Question and Answers
1.) Explain budding in detail.
Ans. In the process of budding, a bud develops as an outgrowth on the organism due to the repeated cell division of the regenerative cells at a specific site on the body. These buds then develop into the tiny individuals and when they are fully mature, they detach from the parent body and become new independent individuals. Organism such as Hydra reproduces by the method of budding.
2 ) differentiate between self- pollination and cross- pollination?
Ans. Pollination is the transfer of pollen grains from anther to the stigma. It is of two types depending upon the same/ different flower. If the transfer of pollen occurs in the same flower, then it is called as self-pollination. On the other hand, if the pollen is transferred from one flower to another flower, then it is known as crosspollination.
3.) Write a comment on different parts of the angiospermic flower.
Ans. the flower of angiosperms is consist of four parts as-
sepals, petals, stamens and pistil. Out of this four parts, two parts (stamens and pistil) are the reproductive parts which participates in sexual reproduction. Stamens are the male reproductive organs which produce pollen grains and pistils are female reproductive organs containing ovules in it. Sepals and petals are non- reproductive parts as they do not participate in sexual reproduction. Both, protects the flower when it is in bud condition.
4.) Describe the structure of pistil?
Ans. Pistil is the female reproductive organ of a plant. It consists of three parts as:
a) The swollen bottom part- ovary containing ovules in it,
b) middle elongated part – style which connects ovary with the stigma
c) and the terminal part – stigma.
5.) Write a note on tissue culture?
Ans. in tissue culture, some cells are placed in an artificial nutrition medium where they divide rapidly to and form a small group of cells also known as callus. The callus is then transferred to another artificial medium containing suitable plant hormones for growth and cell differentiation. The small plantlets are then transferred in the soil so that they can grow into the mature plants.
Using tissue culture technique, many plants can be grown from one parent in disease-free conditions within short time. This technique is commonly used for ornamental plants and also for vegetable and fruit plants. Genetic identity is also conserved.
In case you are missed :- Next Chapter Extra Questions