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Questions
Answer the following question in your own words.
Sketch, label and describe the Spirogyra.
Sketch and label the figure of the following plant and explain them in brief.
Spirogyra
Diagram
Explain
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Solution
- Spirogyra is a green alga belonging to the Thallophyta group of plants. It is commonly found in fresh water, such as ponds, lakes, and slow-moving streams.
- It can survive only in water. The body of Spirogyra is long, thin, and filamentous, like a thread. It is made up of many cells joined end to end, forming an unbranched filament.
- Each cell contains chlorophyll, which allows the plant to perform photosynthesis and prepare its own food.
- A unique feature of Spirogyra is its spiral-shaped chloroplasts, which run along the length of the cell.
- Within these spiral chloroplasts are small, dot-like structures called pyrenoids, which help in the storage of starch. Spirogyra is a multicellular and non-vascular organism.
- It reproduces asexually through fragmentation, where the filament breaks into smaller pieces, and each piece grows into a new organism.
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RELATED QUESTIONS
Match the proper terms from columns A and C with the description in column B.
| ‘A’ | ‘B’ | ‘C’ |
| Thallophyta | Seeds are formed in fruits. | Fern |
| Bryophyta | No natural covering on seeds. | Cycas |
| Pteridophyta | These plants mainly grow in water. | Tamarind |
| Gymnosperms | These plants need water for reproduction. | Moss |
| Angiosperms | Tissues are present for the conduction of water and food | Algae |
Complete the sentence by filling in the blank and explaining the statement.
______ plants have soft and fibre-like body.
Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?
