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Reproduction in Animals (Class - VIII)

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The human male reproductive system consists of several parts. Which of the following is/are not a part of the male reproductive system?

  1. Testes

  2. Ovaries

  3. Epididymis

  4. Penis

  5. Seminal vesicles


Correct Option: B
Explanation:

This is the correct option. Ovaries are not a part of the male reproductive system. They are a part of female reproductive system.

The nucleus of a zygote is formed by the combination of nuclei of sperm and egg. The number of nuclei present in a zygote is

  1. two

  2. one

  3. three

  4. four

  5. five


Correct Option: B
Explanation:

This is the correct option. The nucleus of a zygote is formed by the combination of nuclei of sperm and egg. The number of nuclei present in a zygote is one.

In binary fission, the parent organism ceases to exist and two new organisms come into existence. Which of the following organisms reproduce by this method?

a. Paramecium b. Hydra c. Corals d. Amoeba

  1. Only a and b

  2. Only b and c

  3. Only a and c

  4. Only b and d

  5. Only a and d


Correct Option: E
Explanation:

This is the correct option. Paramecium and amoeba reproduce by the method of binary fission.

The change from a tadpole to a frog is an example of which of the following?

a. Metamorphosis b. Binary fission c. Budding

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: A
Explanation:

This is the correct option. The change from tadpole to a frog is an example of metamorphosis. The transformation of larva into an adult animal is called metamorphosis.

Which of the following is the primary reproductive organ in a woman?

  1. Oviduct

  2. Uterus

  3. Vagina

  4. Ovary

  5. Sperm duct


Correct Option: D
Explanation:

This is the correct option. Ovaries are the real reproductive organ in a woman. The female sex cells are made in the ovaries.

Which of the following statements is/are false?

a. In multiple fission, the parent organism splits to form many new organisms at the same time. b. The bud formed in a hydra is a group of cells, not a single cell. c. A cow that is cloned from a parent cow of high milk yield may or may not be an identical copy of the parent cow.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: E
Explanation:

This is the correct option as this statement is false. A cow that is cloned from a parent cow of high milk yield will be an identical copy of the parent cow.

The animals which lay eggs from which young ones hatch later on are called oviparous animals. Which of the following is not an oviparous animal?

  1. Rat

  2. Sparrow

  3. Frog

  4. Crocodile

  5. Butterfly


Correct Option: A
Explanation:

This is the correct option. Rat is not an oviparous animal. It is a viviparous animal. It gives birth to young ones.

Which of the following terms is used in the reproductive system of flowering plants as well as that of humans?

  1. Epididymis

  2. Anther

  3. Uterus

  4. Ovary

  5. Style


Correct Option: D
Explanation:

This is the correct option. Ovary is a part of the reproductive system of flowering plants as well as that of humans.

In external fertilisation, the male and female animals release their sperms and eggs in water where fertilisation takes place by collisions between sperms and eggs. In which of the following does external fertilisation take place?

  1. Frog

  2. Lizard

  3. Crocodile

  4. Snake

  5. Hen


Correct Option: A
Explanation:

This is the correct option. External fertilisation takes place in frogs.

Uterus is the part where development of baby takes place. Through which of the following is the uterus connected to the vagina?

  1. Oviduct

  2. Funnel of oviduct

  3. Cervix

  4. Ovaries

  5. Epididymis


Correct Option: C
Explanation:

This is the correct option. The uterus is connected to the vagina through a narrow passage called cervix.

Which of the following statements is/are false?

a. An animal having female sex cells called sperms in its body is called female. b. A sperm is a single cell with very little cytoplasm and nucleus tightly packed in its head. c. An egg has a thin layer of jelly coat that allows only one sperm to enter into it during fertilisation.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: A
Explanation:

This is the correct option as this statement is false. An animal having female sex cells called eggs in its body is called female.

Asexual reproduction and sexual reproduction are the two main methods of reproduction in living organisms. Which of the following is not a property of asexual reproduction?

  1. In it, a part of the parent organism separates off and grows into a new organism.

  2. Only one parent is needed to produce a new organism.

  3. Sex cells are involved in this type of reproduction.

  4. It is the simplest method of reproduction.

  5. The young ones are the exact copy of the parent.


Correct Option: C
Explanation:

This is the correct option as this is not a property of asexual reproduction. No sex cells are involved in asexual reproduction.

Which of the following is/are multicellular?

a. Zygote b. Foetus c. Embryo

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c


Correct Option: D
Explanation:

This is the correct option. Foetus and embryo are multicellular.

The process of transformation from an immature form of an animal to its adult form in two or more distinct stages is called metamorphosis. Metamorphosis does not occur in which of the following organisms?

  1. Silk moth

  2. Butterfly

  3. Housefly

  4. Mosquito

  5. Hydra


Correct Option: E
Explanation:

This is the correct option. Metamorphosis does not occur in hydra.

The fusion of sperm with egg is called fertilisation. During fertilisation, a sperm combines with the egg in the oviduct and fertilises it to form a/an

  1. embryo

  2. foetus

  3. placenta

  4. zygote

  5. None of the above


Correct Option: D
Explanation:

This is the correct option. During fertilisation, a sperm combines with the egg in the oviduct and fertilises it to form a zygote.

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