DAV Class - 8 Science Ch - Reproduction in animals. All Questions/Answers
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Answers
Answer:-
After fertilisation takes place inside the body of the hen, the fertilised egg or zygote divides repeatedly to form embryo which travel down the oviduct.
As it travels down the oviduct, many protective layers are formed around the embryo. The hard shell that we see in a hen's egg is the outermost protective layer.
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Questions
Question 1.
What is reproduction?
Answer:
Reproduction is the biological process by which new individual organisms are produced from their parents.
Question 2.
What is sexual reproduction?
Answer:
Reproduction which involves the fusion of male and female gametes is known as sexual reproduction.
Question 3.
What is fertilisation?
Answer:
The fusion of ova and sperm is called fertilisation.
Question 4.
What is a fertilised egg called?
Answer:
Zygote
Question 5.
What is asexual reproduction?
Answer:
The mode of reproduction in which only a single parent is involved.
Question 6.
Which mode of reproduction does take place in human beings?
Answer:
Sexual reproduction
Question 7.
How many partners involve in sexual reproduction?
Answer:
Two (Parents)
Question 8.
Name two animals in which asexual reproduction takes place.
Answer:
Hydra and yeast
Question 9.
Name the reproductive organs of male.
Answer:
A pair of testes, two spermducts and a penis.
Question 10.
Name the reproductive organs of female.
Answer:
A pair of ovaries, oviducts and uterus.
Question 11.
Name the modes of reproduction.
Answer:
Sexual reproduction
Asexual reproduction.
Question 12.
What is male gamete or sperm?
Answer:
The reproductive cell produced by male reproductive organs is called male gamete or sperm.
Question 13.
What is female gamete or ova?
Answer:
The reproductive cell produced by female reproductive organs is called female gamete or ova.
Question 14.
Which organ produces eggs or ovum?
Answer:
A pair of ovary.
Question 15.
Name the male gamete.
Answer:
Sperm
Question 16.
Name the female gamete.
Answer:
Ova or egg
Question 17.
Which male reproductive organ produces sperm?
Answer:
A pair of testes.
Question 18.
In which organ fertilisation take place in female?
Answer:
Fallopian tube
Question 19.
What are the two methods of asexual reproduction?
Answer:
Budding
Binary fission
Question 20.
Name two animals which undergo external fertilisation.
Answer:
Frog and fish
Question 21.
Name two animals which undergo internal fertilisation.
Answer:
Human being and cow
Question 22.
Which type of reproduction takes place in Amoeba?
Answer:
Asexual reproduction through binary fission.
Question 23.
What type of reproduction is cloning?
Answer:
Asexual reproduction
Question 24.
What is foetus?
Answer:
Foetus is a well developed embryo.
Question 25.
What is IVF technique of reproduction?
Answer:
It is fertilisation outside the body.
Question 26.
Give the full form of IVF.
Answer:
In vitro Fertilisation.
Question 27.
How are test tube babies born?
Answer:
Test tube babies are born through IVF technique.
Question 28.
What is cloning?
Answer:
Cloning is the production of exact copy of a part of or whole living body.