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Earn 100
What is Ulva in biology?
Important Questions on Diversity In Living Organisms
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(1) Pyrenoids (2) Ribbon like chloroplast (3) Filamentous structure;
Which organisms has he observed?
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Reason: Both are motile.
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Differentiate between:
(c) Thallophytes and bryophytes
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The following diagram illustrates a filament of spirogyra as seen under the microscope. Its parts have been labelled as A, B, C, D.
Functions of these parts are stated below randomly:
(1) performs photosynthesis
(2) controls activities of a cell
(3) makes the algae slippery to touch
(4) stores starch and protein
The correct matching of the parts and their functions are
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Reason: Each group of algae show predominance of one pigment.
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| Column-I | Column-II | ||
| A. | Phaeophyceae | I. | Funaria, Polytrichum, Sphagnum |
| B. | Rhodophyceae | II. | Equisetum, Psilotum, Pteris |
| C. | Mosses | III. | Ectocarpus, Dictyota, Laminaria |
| D. | Pteridophytes | IV. | Polysiphonia, Porphyra, Gracilaria |
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Which among the following have specialised tissue for the conduction of water?
(i) Thallophyta
(ii) Bryophyta
(iii) Pteridophyta
(iv) Gymnosperms
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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 conduction of water and food. | Algae |
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Reason: Algae and fungi show no differentiation in thallus.
