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प्रश्न
Thallophyta, bryophyta and pteridophyta are called as ‘Cryptogams’. Gymnosperms and Angiosperms are called as ‘phanerogams’. Discuss why? Draw one example of Gymnosperm.
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उत्तर
Thallophyta, Bryophyta ‘and Pterido¬phyta are called “cryptogams”(Kntyptos-hidden, gamos-to marry) as all these are seedless plants and have inconspicuous reproductive organs.
Gymnosperms and Angiosperms are collectively called “phanerogams” (Phaneros-visible, gamos-to marry) as both the groups have seeded plants and conspicuous reproductive organs.
Fig. A: Female Cycas plant
B: Male Cycas plant
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संबंधित प्रश्न
An example for colonial form of algae is
Match the following.
| Cyanophyceae | Green algae |
| Chlorophyceae | Blue-green algae |
| Phaeophyceae | Red algae |
| Rhodophyceae | Brown algae |
Write the differences between algae and fungi.
Which among the following has specialised tissue for conduction of water?
- Thallophyta
- Bryophyta
- Pteridophyta
- Gymnosperms
Polvsiohonia is a ______ alga.
______ is an edible algae.
Classification of algae was given by ______.
Minute algae floating on the surface of the water are called ______.
The cell wall of algae is made up of a chemical substance called chitin.
Mention two forms of algae with examples.
