Tag: introduction to reproduction

Questions Related to introduction to reproduction

Select the mismatched pair of organism and its mode of multiplication.

  1. Organism - Agave, Oxalis; Mode of multiplication - Bulbils

  2. Organism - Amoeba, Paramecium; Mode of multiplication - Binary fission

  3. Organism - Chlamydomonas, Ulothrix; Mode of multiplication - Sporangiospores

  4. Organism - Adiantum ; Mode of multiplication - Adventitious buds present at leaf tips


Correct Option: C
Explanation:

Sporangiospores are non-motile spores produced inside the sporangia. They are generally dispersed by wind and germinate to produce new mycelium (e.g., Rhizopus, Mucor, etc.) In Chlamydomonas and Ulothrix, zoospores are formed.

So, the correct answer is 'Organism - Chlamydomonas, Ulothrix; Mode of multiplication - Sporangiospores'.

Vegetative propagation is the term used for

  1. Sexual reproduction in animals

  2. Sexual reproduction in plants

  3. Asexual reproduction in animals

  4. Asexual reproduction in plants


Correct Option: D
Explanation:
Vegetative propagation (vegetative reproduction) is the formation of new plants from vegetative units such as buds, tubers, rhizomes, etc. This term is used for asexual reproduction in plants. Plants with reduced power of sexual reproduction, long dormant period of seed or poor viability are multiplied easily through vegetative propagation.
So, the correct answer is 'Asexual reproduction in plants'.

Which of the following is not used for vegetative propagation?

  1. Bud

  2. Bulbil

  3. Turion

  4. Antherozoid


Correct Option: D
Explanation:

In sexually reproduction organisms, the male gamete is called the antherozoid or sperm and the female gamete is known as the egg or ovum. They are not used for vegetative propagation.

So, the correct answer is 'antherozoid'

A process of multiplication in which a portion of fragment of plant body function as propagule and develops into new individual is called 

  1. vegetative propagation

  2. sexual propagation

  3. regeneration

  4. metamorphosis


Correct Option: A

Which of the following involves the formation of new plants from roots, stems, and leaves?

  1. Sexual reproduction

  2. Vegetative reproduction

  3. Layering

  4. None of the above


Correct Option: B
Explanation:
Vegetative reproduction involves the formation of new plants from roots, stems, and leaves. It is a form of asexual reproduction of a plant. Only one plant is involved and the offspring is identical to the parent. It mainly involves the mitosis. So, the correct answer is option B.

Which is not a method of vegetative propagation?

  1. Micropropagation

  2. Budding

  3. Sowing

  4. Layering


Correct Option: C
Explanation:

Vegetative propagation is a form of asexual reproduction of a plant. Here, only one plant is involved and the offspring is the result of one parent. The new plant is genetically identical to the parent.
Micropropagation is the practice of rapidly multiplying stock plant material to produce a large number of progeny plants, using modern tissue culture methods.
Layering is a means of plant propagation, in which a portion of an aerial stem grows roots while still attached to the parent plant and then detaches as an independent plant.
Sowing is to scatter the seeds over the land for growth
So, the correct answer is 'Sowing'

Vegetative propagation does not involve the formation of new plants from old 

  1. Roots

  2. Stems

  3. Leaves

  4. Flowers


Correct Option: D
Explanation:

Vegetative propagation is a form of asexual reproduction of a plant. Only one plant is involved and the offspring is the result of one parent.
Almost all types of shoots and roots are capable of vegetative propagation, including, stems, basal shoots, tubers, rhizomes, stolons, corms, bulbs, and buds. In a few species, even leaves are involved in vegetative propagation. However, flowers are never involved in vegetative propagation.

Plants have lost their capacity to produce seeds, reproduce by

  1. Spores

  2. Vegetative propagation

  3. Fission

  4. Regeneration


Correct Option: B
Explanation:

If the plants lose their capacity to produce seed, the plant undergoes asexual reproduction through their vegetative parts like stem, leaf, branch, etc.

So the correct option is 'Vegetative propagation.'

   List I    List II
 I.  Ginger  A.  Tuber
 II.  Onion  B.  Adventitious buds
 III.  Potato  C.   Bulb
 IV.  Byrophyllum   D.  Rhizome
  1. I - D, II - C, III - A, IV - B

  2. I - D, II - F, III - E, IV - C

  3. I - C, II - B, III - A, IV - D

  4. I - D, II - F, III - A, IV - B


Correct Option: A
Explanation:

Ginger is an example of rhizome which is underground modification of the stem. The rhizome grows horizontally to the surface of the soil. 

Onion is an example of bulb in which there are leaves which are placed one above the other in a rosette pattern. This is an underground modification of the stem. 
Potato is an example of tuber. There are eyes which bears adventitious buds which can germinate and develop into new plants. 
Adventitious leaf buds are produced on the notches of Bryophyllum leaf. These adventitious buds can be used for vegetative propagation. The buds can develop into individual plants when favourable conditions are provided. 
Thus, the correct answer is option a.