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Question
Which of the following pairs are correctly matched?
a. Spirogyra - Fragmentation b. Hydra, Planaria and sponges - Regeneration c. Scion - The part of the plant that is grafted to other plant d. Parthenogenesis - Development of organisms from an unfertilized egg
The correctly paired ones are given.
Which of the following pairs are correctly matched?
| a. | Spirogyra | - | Fragmentation |
| b. | Hydra, Planaria and sponges | - | Regeneration |
| c. | Scion | - | The part of the plant that is grafted to other plant |
| d. | Parthenogenesis | - | Development of organisms from an unfertilized egg |
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Solution
The correct option is D a, b, c and d
Spirogyra, a genus of filamentous green algae with the characteristic spiral arrangement of the chloroplast. Commonly found in fresh water. The filament consists of cylindrical elongated and similar cell which are joined to one another. During the vegetative cycle, every filament undergoes fragmentation at maturity. Lower animals like sponges and coelenterates have great regeneration power. Regeneration proves lack of differentiation in these primitive animals. Hydra, Planaria, and sponges will regenerate from a fragment if the fragment, contains both epidermis and gastrodermis layer. In grafting is a process of joining two plants to each other. The upper part of the graft is called scion that forms the top portion of the plant, and the lower part which is called understock makes roots or part of the stem. Parthenogenesis may be defined as the development of female gamete into a new individual without fertilization. Thus the correct answer is option B.
Spirogyra, a genus of filamentous green algae with the characteristic spiral arrangement of the chloroplast. Commonly found in fresh water. The filament consists of cylindrical elongated and similar cell which are joined to one another. During the vegetative cycle, every filament undergoes fragmentation at maturity. Lower animals like sponges and coelenterates have great regeneration power. Regeneration proves lack of differentiation in these primitive animals. Hydra, Planaria, and sponges will regenerate from a fragment if the fragment, contains both epidermis and gastrodermis layer. In grafting is a process of joining two plants to each other. The upper part of the graft is called scion that forms the top portion of the plant, and the lower part which is called understock makes roots or part of the stem. Parthenogenesis may be defined as the development of female gamete into a new individual without fertilization. Thus the correct answer is option B.
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