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Reproduction in Organisms(Class - XII)

Description: Reproduction in Animals (Class - XII)
Number of Questions: 15
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Tags: Reproduction in Animals (Class - XII) Endosperm Reproduction in Animals Reproduction Sexual Reproduction in Organisms Reproduction in Organisms Types of Reproduction
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Which of the following are microscopic motile asexual reproductive structures?

  1. Zoospores

  2. Conidia

  3. Buds

  4. Gemmules


Correct Option: A
Explanation:

A zoospore is a motile asexual spore that uses a flagellum for locomotion. 

Rotation of body during metamorphosis is at 90 degree in

  1. herdmania

  2. snails

  3. sea horse

  4. None of these


Correct Option: A
Explanation:

Rotation of body during metamorphosis is at 90 degree in herdmania.

During the process of evolution, development of trichogyne of algae could be traced as

  1. style of angiosperm

  2. stigma of angiosperm

  3. gynoecium of angiosperm

  4. pollen tube of angiosperm


Correct Option: A
Explanation:

Trichogyne is a long hair-like receptive structure for male sperms.

Ruminate endosperm is commonly found in the seeds of

  1. Euphorbiaceae

  2. Cruciferae

  3. Annonaceae

  4. Compositae


Correct Option: C
Explanation:

Ruminate endosperm is commonly found in the seeds of Annonaceae

Which of the following statements is/are incorrect about fungal reproduction?

  1. Sporangium is a reproductive structure.

  2. Sporangium contains numerous hyphae.

  3. Spores are covered by thick walls.

  4. Spores germinate in the presence of moisture.

  5. All of the above


Correct Option: B
Explanation:

Sporangium contains numerous spores. 

In bryophyllum, new plants arise from buds present on the margin of

  1. leaf

  2. stem

  3. root

  4. seed

  5. None of these


Correct Option: A
Explanation:

The leaf of bryophyllum has notches on the margin. 

Which of the following statements is false?

  1. Bacteria and protozoa reproduce through fission.

  2. The filament of spirogyra divides into many pieces.

  3. In amoeba, splitting of cells can take place in any plane.

  4. Fission in Leishmania can occur in any plane.

  5. Binary fission occurs in a definite orientation in some organisms.


Correct Option: D
Explanation:

In Leishmania, binary fission occurs in a definite orientation in relation to these structures.

Which of the following organisms can reproduce new organisms by regeneration?

  1. Yeast

  2. Mushroom

  3. Planaria

  4. Plasmodium

  5. Amoeba


Correct Option: C
Explanation:

Planaria is one of the many non-parasitic flatworms.

Match the following ||| |---|---| |P. Rhizopus|1. Egg| |Q. Anther|2. Pollen grain| |R. Ovule|3. Spore|

  1. P - 3, Q - 2, R - 1

  2. P - 2, Q - 1, R - 3

  3. P - 1, Q - 2, R - 3

  4. P - 1, Q - 3, R - 2

  5. P - 2, Q - 3, R - 1


Correct Option: A
Explanation:

Rhizopus - Spore Anther - Pollen grain Ovule - Egg

Which of the following is a unicellular animal having short thread-like structures called cilia over its surface?

  1. Leishmania

  2. Paramecium

  3. Hydra

  4. Amoeba

  5. Plasmodium


Correct Option: B
Explanation:

This is the correct option.

Vegetative reproduction is done by using tubers in

  1. potato

  2. bryophyllum

  3. begonia

  4. rhizopus

  5. yeast


Correct Option: A
Explanation:

This is the correct option. In potato, vegetative reproduction is done by using tubers.

Match the following:

P. Spirogyra 1. Vegetative propagation
Q. Rose 2. Fragmentation
R. Planaria 3. Sexual reproduction
S. Human 4. Regeneration
  1. P - 1, Q - 3, R - 2, S - 4

  2. P - 3, Q - 4, R - 1, S - 2

  3. P - 2, Q - 1, R - 4, S - 3

  4. P - 4, Q - 2, R - 3, S - 1

  5. P - 2, Q - 4, R - 3, S - 1


Correct Option: C
Explanation:

New plant of rose is grown by using stem cutting.

Match the following ||| |---|---| |a. Regeneration|1. It is the process of getting back a full organism from its body part. | |b. Fragmentation|2. It is the process in which new plants are obtained from the parts of old plants without the help of any reproductive organs. | |c. Vegetative propagation|3. It is the process of breaking up of the body of a simple multicellular organism into two or more pieces on maturing, each of which subsequently grows to form a complete new organism. |

  1. a - 1, b - 3, c - 2

  2. a - 1, b - 2, c - 3

  3. a - 3, b - 2, c - 1

  4. a - 3, b - 1, c - 2

  5. a - 2, b - 3, c - 1


Correct Option: A
Explanation:

This is the correct option.

Which of the following is correct for sexual reproduction?

  1. Fusion of two male gametes

  2. Fusion of two female gametes

  3. Fusion of one male and one female gamete

  4. Fusion of one male and two polar nuclei

  5. Fusion of two male and two female gametes


Correct Option: C
Explanation:

The fusion of one male gamete and one female gamete is called reproduction.

Reproduction is the process of generating offsprings. Various unicellular organisms reproduce by

  1. fission

  2. regeneration

  3. ovulation

  4. non-disjunction


Correct Option: A
Explanation:

It is a type of asexual reproduction.

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