Which of the following algae contains mannitol as reserve food material
Which of the following algae contains mannitol as reserve food material
Ulothrix
Ectocarpus
Gracilaria
Volvox
The Correct Option is B
Solution and Explanation
To determine which algae contains mannitol as a reserve food material, let's examine the characteristics of each option given in the question:
- Ulothrix: This is a green alga and employs starch as its primary reserve food material, not mannitol.
- Ectocarpus: This is a brown alga, which is part of the Phaeophyceae class, where mannitol and laminarin are commonly used as reserve food materials.
- Gracilaria: This is a red alga known for storing floridean starch, not mannitol.
- Volvox: This belongs to the green algae group and stores starch similar to other green algae, not mannitol.
Therefore, Ectocarpus is the correct answer as it specifically uses mannitol as a reserve food material. This aligns with the general characteristics of brown algae, where mannitol is commonly found as an energy storage molecule.
Conclusion: Based on the characteristics of the different types of algae, Ectocarpus contains mannitol as a reserve food material.
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Concepts Used:
Pteridophytes
Pteridophytes are the first terrestrial vascular plants. Carolus Linnaeus classified them under the group cryptogamae. Pteridophytes occupy a transitional position between bryophytes and spermatophytes.
For Example, Silver fern, Equisetum, Selaginella
The general characteristics of Pteridophytes are:
- They are seedless.
- They are multicellular.
- They reproduce through spores.
- They are independent and free-living organisms.
- They have a well-differentiated plant body into root, stem and leaves.
Classification of Pteridophytes:
Life Cycle of Pteridophyta:
