Find the set that correctly matches the plants in column A with the mode of…
2024
Find the set that correctly matches the plants in column A with the mode of asexual reproduction which they exhibit:
Column A | Column B |
|---|---|
(a) Rose | (i) Budding |
(b) Yeast | (ii) Spore formation |
(c) Ferns | (iii) Fragmentation |
(d) Spirogyra | (iv) Pollination |
(v) Vegetative propagation |
Answer: A. (a)-(v), (b)-(i), (c)-(ii), (d)-(iii) — Concept: Asexual reproduction in plants and simple organisms takes several distinct forms — budding (a new individual grows as a small outgrowth on the parent…
- A.
(a)-(v), (b)-(i), (c)-(ii), (d)-(iii)
- B.
(a)-(iv), (b)-(i), (c)-(v), (d)-(iii)
- C.
(a)-(v), (b)-(iii), (c)-(ii), (d)-(i)
- D.
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
Show answer & explanation
Correct answer: A
Concept: Asexual reproduction in plants and simple organisms takes several distinct forms — budding (a new individual grows as a small outgrowth on the parent and then separates), spore formation (the parent produces reproductive spores that germinate into new individuals), fragmentation (the parent body breaks into pieces, each capable of growing into a complete new organism), and vegetative propagation (a vegetative part — root, stem or leaf — develops into an independent plant). Pollination, by contrast, is the transfer of pollen from anther to stigma and belongs to sexual, not asexual, reproduction.
Application: Apply each definition to the four organisms listed in column A:
Organism | Mode of asexual reproduction | Why |
|---|---|---|
Rose | Vegetative propagation (v) | New rose plants are raised commercially from stem cuttings, so a vegetative part of the parent grows into a whole new plant. |
Yeast | Budding (i) | A daughter cell grows as a small outgrowth on the parent yeast cell and then pinches off as a separate individual. |
Ferns | Spore formation (ii) | Sporangia on the underside of the frond release spores that germinate into new fern plants. |
Spirogyra | Fragmentation (iii) | The filament breaks into fragments, and each fragment grows into a complete new filament. |
Cross-check 1: Pollination (iv) is a step in sexual reproduction — the transfer of pollen from anther to stigma — so it cannot be the asexual mode of any organism in column A. Every set that pairs it with rose is ruled out on that ground alone.
Cross-check 2: Budding and fragmentation are the easiest pair to swap: a yeast daughter cell buds out and pinches off, while a Spirogyra filament physically breaks apart. Pairing fragmentation with yeast, or budding with Spirogyra, reverses the two mechanisms.
Result: The set (a)-(v), (b)-(i), (c)-(ii), (d)-(iii) matches every organism in column A with its true mode of asexual reproduction.