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Question
Which one of these in not an algae?
Which one of these in not an algae?
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Solution
The correct option is D Nostoc
Nostoc is not a plant, alga, or bacterium. Instead, Nostoc is a cyanobacteria.
Cyanobacteria are are microscopic, single-celled organisms that contain no cell nucleus. Nostoc cyanobacteria form single-celled thread like structures called filaments. Nostoc contains two pigments, blue phycocyanin and red phycoerythrin, as well as chlorophyll, and has the ability to fix nitrogen in specialized cells called heterocysts. Hence Nostoc is considered as blue-green alga (cyanobacterium) belonging to kingdom Monera.
While fucus is a brown alga, chara is a green alga and polysiphonia is a red alga.
So, the correct answer is "Nostoc"
Nostoc is not a plant, alga, or bacterium. Instead, Nostoc is a cyanobacteria.
Cyanobacteria are are microscopic, single-celled organisms that contain no cell nucleus. Nostoc cyanobacteria form single-celled thread like structures called filaments. Nostoc contains two pigments, blue phycocyanin and red phycoerythrin, as well as chlorophyll, and has the ability to fix nitrogen in specialized cells called heterocysts. Hence Nostoc is considered as blue-green alga (cyanobacterium) belonging to kingdom Monera.
While fucus is a brown alga, chara is a green alga and polysiphonia is a red alga.
So, the correct answer is "Nostoc"
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