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Questions and Answers
What is the main characteristic that defines plants in the Thallophyta division?
What is the main characteristic that defines plants in the Thallophyta division?
Why are Bryophytes referred to as the 'amphibians' of the plant kingdom?
Why are Bryophytes referred to as the 'amphibians' of the plant kingdom?
Which of the following statements is true about algae?
Which of the following statements is true about algae?
How do bryophytes like Moss differ from higher plants in terms of their structure?
How do bryophytes like Moss differ from higher plants in terms of their structure?
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Why are fungi like yeasts and molds included in the Thallophyta division?
Why are fungi like yeasts and molds included in the Thallophyta division?
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What is the common method of reproduction in plants belonging to the Thallophyta, Bryophyta, and Pteridophyta groups?
What is the common method of reproduction in plants belonging to the Thallophyta, Bryophyta, and Pteridophyta groups?
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What distinguishing feature do plants of the Pteridophyta division have that separates them from the Thallophyta group?
What distinguishing feature do plants of the Pteridophyta division have that separates them from the Thallophyta group?
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Which characteristic is shared by all the plants mentioned in the text, regardless of their specific group?
Which characteristic is shared by all the plants mentioned in the text, regardless of their specific group?
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What is the distinctive method of reproduction seen in plants of the Bryophyta division?
What is the distinctive method of reproduction seen in plants of the Bryophyta division?
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Which group of plants are referred to as cryptogams according to the text?
Which group of plants are referred to as cryptogams according to the text?
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Study Notes
Observing Plant Cells
- Under a compound microscope, observe the spirally arranged green thread-like chloroplasts in the cells of Spirogyra.
Characteristics of Pteridophyta
- Plants in this group have well-developed roots, stem, and leaves, and separate tissues for conduction of food and water.
- They do not bear flowers and fruits.
- They reproduce with the help of spores formed along the back or posterior surface of their leaves.
- Examples include ferns, Nephrolepis, Marsilea, Pteris, Adiantum, Equisetum, Selaginella, and Lycopodium.
Characteristics of Bryophyta
- Plants in this group reproduce by spore formation.
- They are called cryptogams as their reproductive organs cannot be seen.
- They have a flat, ribbon-like long structure without true roots, stem, and leaves.
- Instead, they have stem-like or leaf-like parts and root-like rhizoids.
- Examples include Moss (Funaria), Marchantia, Anthoceros, and Riccia.
Characteristics of Thallophyta
- Plants in this group grow mainly in water.
- They do not have specific parts like root-stem-leaves-flowers.
- They are autotrophic due to the presence of chlorophyll.
- Examples include algae, Spirogyra, Ulothrix, Ulva, and Sargassum.
- They may be unicellular or multicellular, and microscopic or large.
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Description
Explore the world of algae and its diverse forms. Learn about the characteristics of algae such as Spirogyra, Ulothrix, Ulva, and Sargassum which can be found in fresh and saline water.
