NCERT Class 8 Science Chapter 9 Reproduction in Animals Extra Questions and Answers
Class 8 Science Chapter 9 Extra Questions and Answers – Reproduction in Animals. Here in this Page Class VIII Students can Learn Extra Questions & Answer 9th Chapter Science fully Inside.
We Provided Here Reproduction in Animals Science Chapter 9 Long Answer Type Question, Very Short Type Questions (VSA) / MCQ Type Questions, Short Type Questions (SA).
1) Fill in the blanks:
a) The animals which lay eggs are called ____. (Oviparous)
b) External fertilization is observed in ____. (Dog)
c) A reproduction organ of the male is ____. (Testes)
d) The fertilized egg is called a ____. (Zygote)
2) Multiple choice questions:
a) The testes produces male gametes called ____?
a) Ova b) Sperms
Ans. b) Sperms
b) The asexual reproduction of hydra is called ____?
a) Binary fission b) Budding
Ans. b) Budding
c) A reproduction organ of the female is ____?
a) Testes b) Ovary
Ans. b) Ovary
d) The fusion of ovum and sperm is called ____?
a) Reproduction b) Fertilization
Ans. b) Fertilization
3) Match the items of column I with the information of column II:
Column I Column II
a) Ovai. The asexual reproduction of amoeba
b) Fish The animals which give birth to young ones
c) Binary fission female gametes produced in ovary
d) Oviparousiv. Internal fertilization is observed
e) Viviparous The animals which lay eggs
Ans. a) – iii. , b) – iv. , c) – i. , d) – v. , e) – ii.
4) Answer the following questions:
a) Define the two modes of reproduction.
Ans. 1.) The reproduction resulting from the fusion of male and female gametes is called sexual reproduction.
2.) The type of reproduction in which only a single parent is involved is called asexual reproduction.
b) Name two single cell of a human body. Where does the development of the baby takes place?
Ans. Two single cell of a human body are egg and sperm.
The development of the baby takes place in uterus.
c) Define the two types of fertilization with examples.
Ans. 1.) The fertilization that takes place inside the female body is called internal fertilization. Example – Internal fertilization occurs in human.
2.) The fertilization that takes place outside the female body is called external fertilization. Example – External fertilization occurs in fish.
5) Fertilization results in the formation of zygote which begins to develop into an embryo. The zygote divides repeatedly to give rise to a ball of cells. The cells then begin to form groups that develop into different tissues and organs of the body. This developing structure is termed an embryo. The embryo gets embedded in the wall of the uterus for further development. The embryo continues to develop in the uterus. It gradually develops body parts such as hands, legs, head, eyes, ears etc. The stage of the embryo in which all the body parts can be identified is called a fetus. When the development of the fetus is complete, the mother gives birth to the baby.
a) When the development of the ____ is complete, the mother gives birth to the baby.(fetus)
b) The developing cell structure is termed a____. (embryo)
c) The stage of the embryo in which all the body parts can be identified is called a ____. (Fetus)
d) The embryo continues to develop in the _____. (Uterus)
More Extra Questions and Answers
Q.1) Fill in the blanks given below
1) The testes produce the male gametes called SPERMS.
2) The reproduction beginning from fusion of male and female gametes is called SEXUAL REPRODUCTION.
3) Animals which lay eggs are called as OVIPAROUS.
4) The stage of the embryo in which all body parts can be identified is called a FOETUS.
5) The type of reproduction in which only single parent is involved is called ASEXUAL REPRODUCTION.
Q.2) State whether the following statements are true or false
1) Like plants, reproductive parts in animals also produce gametes that fuse to form a Zygote.
Ans :True
2) The final step in the process of reproduction is the fusion of a sperm and an ovum.
Ans :False
3) Test tube baby grow in test tube.
Ans :False
4) Amoeba is a single celled organism.
Ans : True
5) Cloning is the production of an exact copy of a cell , any other living part or complete organism.
Ans :True
Q.3) Name the following
1) Animals which lay egg – Hen
2) Amoeba is produced by these fusion – Binary fission
3)Stage of the embryo where all body parts can be identified – Foetus
4) Embryo continues to develop in – Uterus
5) Hen gives birth to younger ones by these reproduction – External reproduction
Q.4) Define the following
1) Fertilisation
Ans. When one sperm come in contact with an egg , one of the sperm may fuse with the egg.Suchfuion of the egg and the sperm is called Fertilisation.
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2) External fertilization
Ans. Fertilisation in which the fusion of a male and a female gamete takes place outside the body of female is called External fertilization.
3) Viviparous animals
Ans. Animals which give birth to their young ones are called as viviparous animals.
4) Metamorphosis
Ans. The transformation of the larva into an adult through drastic changes is called Metamorphosis.
5) Budding
Ans. When new individuals develop from the buds in hydra, these type of asexual reproduction is called as budding.
Q.4) Answer the following
1) Describe Female reproductive system in humans.
Ans. i) The female reproductive system have a pair of ovaries , oviducts , uterus.
ii) A single matured egg is released by ovaries every month.
iii) When sperm comes in contact with the egg , then fusion of egg and sperm causes fertilization . These is the first step of reproduction.
iv) During fertilization ,the nuclei of sperm and egg form a single nucleus called as Zygote.These Zygote divides repeatedly to give rise to cells that develop into group to form tissue and organs of the body called as Embryo.
v) These embryo continues the growth in uterus resulting in the development of body parts called as foetus.
vi) After the development of foetus , child is born.
2) Explain the binary fission in ameaoba
Ans. i) Amoeba is an single celled organism.
ii) It starts the process of reproduction by division of nucleus into two nuclei.
iii) This is followed by division of its body into two , each part receiving a nucleus.
iv) Two amoeba are formed by single parent amoeba.
v) These type of asexual reproduction in which an animal reproduces by dividing into two individuals is called Binary fission.
Q.5) Give one example of each
1) Animals in which internal fertilization takes place
Ans. Cow , Dog
2) Animals in which external fertilization takes place
Ans. Fish , frogs
3) Oviparous animals
Ans. Butterfly , Hen , Frog
4) Viviparous animals
Ans. Human beings , Cow
5) Animals which are produced by budding
Ans. Hydra
6) Animals produced by binary fission
Ans. Amoeba
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