Write a short note on spirogyra?

Answer 1

Spirogyra is a member of the Algae. These are simple plants ranging from single-celled organisms (Chlamydomonas, Euglena) to complex seaweeds. They contain chlorophyll and make their food by photosynthesis. Spirogya is a filamentous alga. Its cells form long, thin strands that, in vast numbers, contribute to the familiar green, slimy 'blanket weed' in ponds. Seen under the microscope, each filament consists of an extensive chain of identical cells. Each cell contains a helical chloroplast, a nucleus, cytoplasm and a vacuole enclosed in a cellulose cell wall.