Tag: reproduction in plants

Questions Related to reproduction in plants

Leaf tips help in vegetative propagation in

natural vegetative propagation reproduction in plants biology

  1. Begonia

  2. Bryophyllum

  3. Sensevieria

  4. Adiantum caudatum

Show answer
Correct Option: D
Explanation:

The tip of the leaf help in vegetative propagation in Adiantum caudatum. It is an evergreen, perennial fern producing fronds up to 60 cm tall from a shortly-creeping rhizome. It is also known as Maidenhair fern because of the shiny black rachis of the leaves. It has buds at the tip of the leaf which helps in vegetative propagation. The buds enter the ground when the leaf bends and touches the soil. There they develop into a new individual. Due to this phenomena, it is also known as walking fern.

So, the correct answer is option D.

Roots are used in the vegetative propagation of

natural vegetative propagation reproduction in plants biology

  1. Ginger.

  2. Chrysanthemum.

  3. Sweet Potato.

  4. Potato.

Show answer
Correct Option: C
Explanation:
The asexual reproduction where the vegetative part of the plant which give rise to a new plant is known as vegetative reproduction. Ginger is propagated by the rhizome. Chrysanthemum is propagated by stem cutting. Roots are used in vegetative propagation of sweet potato. The roots bear adventitious buds from which new plants can develop when it is buried in the moist soil. Such roots are called reproductive roots. Potato is propagated by eye of tuber.
So, the correct answer is option C.

Vegetative propagation by leaves is found in

natural vegetative propagation reproduction in plants biology

  1. Albizzia lebbek

  2. Dalbergia sisso

  3. Bryophyllum diagremontianum

  4. Murraya sp

Show answer
Correct Option: C
Explanation:
Bryophyllum diagremontianum is characterized, by the formation of plantlets in leaf notches while attached to the plant. The multiplication of the plant takes place by vegetative propagation. Bryophyllum is multiplied vegetatively by leaves. The leaves of the Bryophyllum has an adventitious bud in its notch which is meristematic in nature and sprouts when attached to the plant. It adventitious bud has the potential to germinate into new plantlet when it falls on the moist soil by rooting.
So, the correct answer is option C.

Which is wrongly matched?

natural vegetative propagation reproduction in plants biology

  1. Agave- bulbils

  2. Penicillium- conidia

  3. Water Hyacinth- runner

  4. Bryophyllum- leaf buds

Show answer
Correct Option: C
Explanation:
Bulbils are a small bulb-like structure which is mainly present in the axil of leaf and stem. Agave bears bulbil which falls on the ground and forms a new plant. It is present in the axil of bracts in agave. Bulbils are considered as modified vegetative and floral buds which stores food and also helps in vegetative propagation of the plants.
Penicillium is propagated by the non-motile spore known as conidia formed on conidiophore.
Water Hyacinth propagates by offsets. An offset is a short thick runner like the branch which produces a new plant at its tip. The offsets grow in all directions from the main stem of the parent plant. 
Bryophyllum is multiplied vegetatively by buds present in the leaves. The leaves of the Bryophyllum has a notch which when falls on the moist soil, germinates into flower. The notch is meristematic in nature which has the potential to germinate into a new plant which has adventitious roots.
So, the correct answer is option C.

Which of the following plants does not help in vegetative propagation by leaves

natural vegetative propagation reproduction in plants biology

  1. Begonia

  2. Kalanchoe

  3. Bryophyllum

  4. Oxalis

Show answer
Correct Option: D
Explanation:
Oxalis propagates through runner and bulbils. Bulbils are a small bulb-like structure which is mainly present in the axil of leaf and stem. The bulbil falls on the ground and form a new plant. In oxalis, the bulbils occur above the base of the fleshy root. Bulbils are considered as modified vegetative and floral buds which stores food and also helps in vegetative propagation of the plants.
Oxalis also propagates by runners where the stem spreads on the ground and develop the root on lower side and leaf on the upper side at the point on the stem and develop into a new plant.
So, the correct answer is option D.

Petiole is used in multiplication of

natural vegetative propagation reproduction in plants biology

  1. Bignonia

  2. Saintpaulia

  3. Sansevieria

  4. Pepromia

Show answer
Correct Option: D
Explanation:

Peperomia is a small perennial epiphyte growing on rotten wood. These plants are  naturally propagated by seeds but these are commercially propagated by leaf or stem cuttings. The petiole is an important part of leaf which is used for the propagation. Leaves are harvested from stock plants for which propagation is desired. The petiole section of each leaf is sterilized and cultured on a nutrient media which forms callus and finally develops into a plantlet.

So, the correct answer is option D.

Which of the following is a part of vegetative propagation?

natural vegetative propagation reproduction in plants biology

  1. Root

  2. Stem

  3. Leaf

  4. All of the above

Show answer
Correct Option: D
Explanation:

Vegetative propagation is a generation of the new plant with help of vegetative parts of the plant without producing seed. It occurs with stem, root, bulb and leaves. The meristematic cells of the vegetative part undergo rapid division to form a new organism.

So, the correct answer is option D.

Which one propagates through an offset?

natural vegetative propagation reproduction in plants biology

  1. Cynodon dactylon

  2. Eichhornia

  3. Fragaria

  4. Mentha

Show answer
Correct Option: B
Explanation:
A. Cynodon dactylon, also known as Indian doob, is a perennial grass which propagates by means of rhizomes and stolons.
B. Eichhornia, commonly known as water hyacinth, is an invasive aquatic species which propagates by means offset. Offset are the modified stems which on detachment from the parent plant develop into a new plant.
C. Fragaria, commonly known as strawberry, is a herbaceous plant that propagates by means of stolons and runners.
D. Mentha, commonly known as peppermint, is a herbaceous plant that propagates by means of stolons.
So, the correct answer is 'Eichhornia'.

A slender lateral branch arises from the base of the main axis and after growing aerially for some time arch downwards to touch the ground. Such type of modification is

natural vegetative propagation reproduction in plants biology

  1. Runner

  2. Sucker

  3. Stolon

  4. Offset

Show answer
Correct Option: C
Explanation:

A- Underground stems of some plants spread to new niches and when older parts die new plants are formed. e.g., grass and strawberry.

B- In these plants, a slender lateral branch arises from the base of the main axis and after growing aerially for some time arch downwards to touch the ground. e.g., mint and jasmine.
C- A lateral branch with short inter-nodes and each node bearing a rosette of leaves and a tuft of roots are found in aquatic plants. e.g., Pistia and Eichhornia.
D- In these, the lateral branches originate from the basal and underground portion of the main stem, grow horizontally beneath the soil and then come out obliquely upward giving rise to leafy shoots. e.g., banana, pineapple, and Chrysanthemum.
So, the correct option is 'Stolon'.

A ________ usually grows along the surface of the ground.

natural vegetative propagation reproduction in plants biology

  1. Runner

  2. Tendril

  3. A & B

  4. None of the above

Show answer
Correct Option: A
Explanation:
Creeping stems are usually referred to as runners. They are found running horizontally on the soil surface. Their nodes usually bear axillary buds, adventitious roots, and scale leaves. They arise from axillary buds and run in almost all directions. They also play a role in vegetative propagation. For example, Cynodon (Lawn grass), Oxalis (Wood sorrel), etc.
So, the correct answer is 'Runner'.