Tag: biology

Questions Related to biology

Which of the following groups of plants are propagated through underground root ?

natural vegetative propagation reproduction in plants biology

  1. Bryophyllum, and kalanchoe

  2. Ginger, potato, onion and zamikand

  3. Pistia, chrysanthemum and pineapple

  4. Sweet potato, asparagus, tapioca and dahlia

Show answer
Correct Option: D
Explanation:

Plant propagation from the vegetative part of a parent plant through asexual mode is called vegetative propagation. This is possible because of the presence of meristematic tissue capable of cellular differentiation, in many plant tissues. A part of stem, root or leaf can grow adventitious roots and form a new plant.

Some plants have swollen fleshy roots called root tubers. These tubers bear buds which can develop into the new plant if covered with moist soil e.g., sweet potato, dahlia, yam, tapioca, asparagus etc.
Thus, the correct answer is option D.

Which one is propagated by cuttings? 

natural vegetative propagation reproduction in plants biology

  1. Bougainvillea

  2. Tea

  3. Sansevieria

  4. All the above

Show answer
Correct Option: D
Explanation:
Hardwood cuttings of Bougainvillea, Ixora etc. can be rooted with good amount of success if root-promoting hormones are used. Sansevieria can be propagated through leaf cutting or planting a leaf section and Tea is propagated through cutting from the end of a branch on the tree below a leaf node that has an axillary bud forming. 
So the correct option is 'Bougainvillea, Tea and Sansevieria'.

Potato is a native of.

natural vegetative propagation reproduction in plants biology

  1. Peru

  2. Mexico

  3. India

  4. China

Show answer
Correct Option: A

Statement $1$ : Many plants are propagated vegetatively even though they bear seeds.
Statement $2$: Sweet potatoes multiply vegetatively by root tubers.

natural vegetative propagation reproduction in plants biology

  1. Both statements $1$ and $2$ are correct

  2. Statement $1$ is correct but statement $2$ is incorrect

  3. Statement $1$ is incorrect but statement $2$ is correct

  4. Both statements $1$ and $2$ are incorrect

Show answer
Correct Option: A
Explanation:

Vegetative propagation is the formation of new plants from vegetative units such as buds, tubers, rhizomes, etc. This method produces a large number of population of clones in a short time. It preserves purity, resistance and food qualities of race/variety indefinitely. Fleshy roots (root tubers) which develop adventitious buds also take part in vegetative propagation, e.g., sweet potato.

So, the correct answer is 'Both statements 1 and 2 are correct'.

Read the following statements and select the correct ones.


(i) Conidia are the asexual propagules restricted to Kingdom Fungi.
(ii) A piece of potato tuber having at least one eye (or node) is capable of giving rise to a new plants.
(iii) Ginger propagates vegetatively with the help of its underground roots.
(iv) Fleshy buds which take part in vegetative propagation are called bulbils, present in Dioscorea, Agave, etc.

natural vegetative propagation reproduction in plants biology

  1. (ii) and (iii)

  2. (i) and (iv)

  3. (i), (ii), and (iv)

  4. (i), (ii), and (iii)

Show answer
Correct Option: C
Explanation:

Ginger propagates vegetatively with the help of rhizome. Rhizomes are main underground stems which store food for perennation during unfavourable conditions. These have buds for formation of new aerial during favourable conditions.

So, the correct answer is '(i), (ii) and (iv)'.

Bryophyllum propagates through spore formation.

natural vegetative propagation reproduction in plants biology

  1. False

  2. True

  3. Ambiguous

  4. Data insufficient

Show answer
Correct Option: A
Explanation:

Bryophyllum produces plantlets along the margins of its leaves. When they mature, they drop off and root in any suitable soil beneath thereby performing the function of vegetative propagation.
Thus, the correct answer is option (A), 'False'.

Vegetative propagation refers to formation of new plants from

natural vegetative propagation reproduction in plants biology

  1. Stem, roots and flowers

  2. Stem, roots and leaves

  3. Stem, flowers and fruits

  4. Stem, leaves and flowers

Show answer
Correct Option: B
Explanation:

Vegetative propagation is type of asexual reproduction in which new plant is produced from root, stem, leaves and bud. New plant is produced from vegetative part so it is called as vegetative propagation.

The vegetative reproduction in sweet potato is done by

natural vegetative propagation reproduction in plants biology

  1. Stem

  2. Leaf

  3. Root

  4. Flower

Show answer
Correct Option: C
Explanation:

The vegetative propagation of sweet potato can be done by roots. Sweet potato is a modification of adventitious roots, which grow from the nodes of a running stem and they are irregularly swollen due to storage of food. They can give rise to adventitious buds, which when detached can give rise to new plants thus performing the function of vegetative propagation.
Thus, the correct answer is option (C), 'Roots'.

The common mode of vegetative reproduction in ginger is through

natural vegetative propagation reproduction in plants biology

  1. Corm

  2. Rhizome

  3. Bulb

  4. Stem cuttings

Show answer
Correct Option: B
Explanation:

The plant species exhibiting vegetative reproduction by following structures are:

-Corm: Alocasia and Colocasia
-Rhizome: Banana, Ginger and Turmeric
-Bulb: Onion and Garlic
-Stem cuttings: China rose, Croton, Rose, Citrus, Bougainvillea, etc.
So, the correct answer is 'Option B- Rhizome'.

Phylloclade is found in

natural vegetative propagation reproduction in plants biology

  1. Chrysanthemum

  2. Asparagus

  3. Ruscus

  4. Opuntia

Show answer
Correct Option: D