Algae
Algae
Algae comes under the division thallophyta.
Characteristics of Algae:
Algae are simple aquatic organisms which are capable of photosynthesis. Some algae, like Chlamydomonas, are unicellular. Some form colonies like Volvox, and filaments like Spirogyra.
Green Algae: Chlamydomonas and Spirogyra are green algae and they live in freshwater. It is a large, informal grouping of algae having the primary photosynthetic pigment chlorophyll. Some of the green algae are good source of proteins, lipids, fibres and omega 3 fatty acids.
Brown Algae: These are marine algae. They are the most complex type of algae. Example: Laminaria , Fucus, Sargassum
Red Algae: They are mostly marine. Gel forming substance like agar is extracted from this algae. Example: Geladium and Gracilaria
Lichens: Lichens are a symbiotic association of fungi and algae. Remember that particular lichen is an association of a specific fungus and a specific alga. Both benefit from each other. They grow on rocks, stems of trees, old walls and so on, and may be grey-green or brightly coloured. The fungus forms most of the plant body, absorbs water and nutrients from the surroundings, and provides these to its partner. The alga manufactures food from the raw materials and supplies it to the fungus. They are sensitive to the pollution. Lichens are sensitive to sulphur dioxide. Due to its absorbative properties they they can accumulate a large amount of sulphur.
Volvox and pandorina are ________________ | |||
| Right Option : A | |||
| View Explanation | |||
A unicellular algae is ____________ | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following plants has an undifferentiated plant body and lacks vascular tissue? | |||
| Right Option : A | |||
| View Explanation | |||
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