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.
Vascular tissue is present in all except _________________ . | |||
| Right Option : D | |||
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Match column I with column II and select the correct option from the codes given below. (There can be more than one match for column I.)
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| Right Option : B | |||||||||||||||||||||
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_______________ algae considered as ancestors of land plants. | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
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10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
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Manish Kumar
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7thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
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Aman Kumar Shrivastava
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Cheshta
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Ayan Ghosh
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Barkha Arora
10thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
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