Tag: other modes of vegetative propagation

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Questions Related to other modes of vegetative propagation

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Asexual reproduction is related to

  1. Amphimixis

  2. Agamospermy

  3. Vegetative propagation

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
There are two modes of reproduction in plants: Sexual reproduction and Asexual reproduction. 
In sexual reproduction, there is the fusion of gametes of two different parents (called as syngamy) whereas, in sexual reproduction, offspring is formed from a single parent without the formation of gametes. Amphimixis is a kind of sexual reproduction which involves the meiosis and syngamy. A special type of asexual reproduction is there which is known as Apomixis in which there is seed formation without the fusion of gametes. Apomixis is further divided into two categories: Vegetative propagation and agamospermy. In vegetative propagation, any part of the plant may develop into a new plant. In agamospermy, plant propagation occurs by means of apomictic seeds or asexual seeds. 
Therefore, both vegetative propagation and agamospermy are types of asexual reproduction.
So, the correct answer is D.
Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Why seed dispersal is important?

  1. Survival of plant

  2. Introduction of plant

  3. Adaptation of plant

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Dispersal of seed is important as if seeds germinate near to parent plants it will increase a lot of competition for air, water, and food as well. 
  • If competition increases it will lead to the death of the species and dispersal also leads to exposure to a new environment that helps in adaptation and evolution.

So, the correct option is 'Survival of plant'.

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Seeds tarvel with water is filled with

  1. Water

  2. Air

  3. Protein

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Seeds that travel in water is modified certain mechanism that make them light and filled with air so that they are able to travel a long distance and reach to places that are far from the parents. Its best example is the modification of mesocarp of coconut that helps it in hydrochory and able it to float a long distance.

So, the correct option is 'Air'

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Which of the following is correct for r-selected spices?

  1. Large number of progeny with small size

  2. Large number of progeny with large size

  3. Small number of progeny with small size

  4. Small number of progeny with large size
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In r selected species the populations have a large number of offsprings while in k-selected species, the populations have a small number of offsprings. However, the offspring size in k-selected species is larger than that of r-selected species. 

So, the correct option is 'Large number of progeny with small size'.

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Reproduction in Bryophyllum takes place by

  1. Root

  2. Leaf

  3. Stem

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Some plants develop adventitious buds on their leaves which get detached and develop new plants. Leaves of Bryophyllum develop small plantlets with adventitious roots along their margins. These get detached and give rise to a complete plant. Thus it is a natural method of vegetative propagation in this plant with the help of leaves. Leaves of some other plants such as Kalanchoe, Begonia and Streptocarpus also develop adventitious buds in their leaves. 

In some plants such as tapioca, sweet potato buds present on the roots develop into leafy shoots above ground and adventitious roots at their bases. 
Vegetative propagation by stem takes place in mint, onion, garlic, banana etc. 
Thus, the correct answer is option B.

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

Bryophyllum reproduces vegetatively through _________.

  1. Leaf

  2. Root

  3. Stem

  4. Flower
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bryophyllum is a plant genus of the Crassulaceae. These plantlets arise from mitosis of meristematic-type tissue in notches in the leaves. Bryophyllum are naturalised in many parts of the tropics, and deliberately cultivated for their attractiveness or for their interesting reproduction. Reproduction in Bryophyllum occurs asexually through vegetative propagation by leaves. The leaf of Bryophyllum is broad and has notches at its margins. Buds arise from the notches. These buds are called epiphyllous buds. These buds can give rise to new plants with adventitious roots, shoots and small leaves. The new plants then detach from the leaves and develop into a mature plant after coming in contact with the soil. 


So the correct option is 'leaf'.

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

The bryophyllum bud produces new plants in the presence of 

  1. Low humidity

  2. Moisture

  3. High humidity

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plant like Bryophyllum buds grow in the margins of leaves. When a leaf of this plant falls on a moist soil, each bud can give rise to a new plant. So the correct option is 'Moisture'.

Multiple choice evs seed becomes plant other modes of vegetative propagation the journey of seeds introduction to reproduction

In which one pair, both the plants can be vegetatively propagated by leaf pieces?

  1. Bryophyllum and Kalanchoe

  2. Chrysanthemum and Agave

  3. Agave and Dioscorea

  4. Bryophyllum and Asparagus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In Bryophyllum and Kalanchoe, the plants can vegetatively propagate while the leaves still are attached to the branch. The leaves of this plant begin the process of mitosis and asexually reproduce in the form of plantlets that cover the edges of each leaf. Once these plantlets develop, they drop off and grow into new plants when they find fertile ground.

So, the correct option is 'Bryophyllum and Kalanchoe'.