Tag: biology

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Multiple choice natural vegetative propagation reproduction in plants biology

Petiole is used in multiplication of

  1. Bignonia

  2. Saintpaulia

  3. Sansevieria

  4. Pepromia
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

Multiple choice natural vegetative propagation reproduction in plants biology

Which of the following is a part of vegetative propagation?

  1. Root

  2. Stem

  3. Leaf

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

Multiple choice natural vegetative propagation reproduction in plants biology

Which one propagates through an offset?

  1. Cynodon dactylon

  2. Eichhornia

  3. Fragaria

  4. Mentha
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice natural vegetative propagation reproduction in plants biology

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

  1. Runner

  2. Sucker

  3. Stolon

  4. Offset
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

Multiple choice natural vegetative propagation reproduction in plants biology

A ________ usually grows along the surface of the ground.

  1. Runner

  2. Tendril

  3. A & B

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice natural vegetative propagation reproduction in plants biology

Each leaf scar in a tuber has a bub called _______.

  1. Eye

  2. Scale

  3. Both A & B

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
(A) Eye.
The tuber consists of parts of a normal stem, including nodes and internodes. The nodes are the eyes and each has a leaf scar. The nodes or eyes are arranged around the tuber in a spiral fashion beginning on the end opposite the attachment point to the stolon.
Multiple choice natural vegetative propagation reproduction in plants biology

A short aquatic runner may be called as?

  1. Trailers

  2. Stolon

  3. Offset

  4. Sucker
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A stolon is a slender branch that grows horizontally above the ground and roots at the nodes, often referred to as an aquatic runner in some contexts.

Multiple choice natural vegetative propagation reproduction in plants biology

Which of the following is incorrect?


I. Bryophyllum and Kalanchoe can be vegetatively propagated by leaf segments.
II. Mango and Guava are propagated through grafting.
III. Individual of clone have same height.
IV. Roots are used in the vegetative propagation of sweet potato.
V. Oestrus cycle is found in mammalian females other than primates.

  1. I and II

  2. Only III

  3. II and IV

  4. IV and V
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Answer is option A i.e. "I and II"
Bryophyllum and Kalanchoe can reproduce by the formation of buds on leaves, i.e. they can propagate vegetatively. Mango and guava asexually reproduce or propagated through grafting. Grafting is the basic propagation option for mango and guava.
Whereas, clones have same genetic make-up but not phenotypic (e.g. their height may differ).
Vegetative propagation of sweet potato occurs through adventitious buds.
Oestrus cycle is the period in the sexual cycle of female mammals, except the higher primates.

Multiple choice natural vegetative propagation reproduction in plants biology

Onions and gladioli grow from

  1. Bulbs

  2. Roots

  3. Buds on the leaf margin

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

Onions and gladioli are classic examples of plants that propagate using bulbs, which are underground modified stems with fleshy leaves.

Multiple choice natural vegetative propagation reproduction in plants biology

Seeds are not a product of reproduction in

  1. Lemons

  2. Potatoes

  3. Tomatoes

  4. Jowar
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The potato is a starchy, tuberous crop which is native to America. Potato do not reproduce by sexual reproduction which requires seeds. 
  • Potatoes are mainly propagated by vegetative methods (cloning). Potato tubers have nodes or eyes from which the new growth begins. The new stems growing from each eye are called sprouts which give rise to the new plant.
  • So, the correct answer is 'Potatoes'.