Question

why is a spirogyra green in colour?

Answer 1

Spirogyra is very common in relatively clean eutrophic water, developing slimy filamentous green masses. In spring Spirogyra grows under water, but when there is enough sunlight and warmth they produce large amounts of oxygen, adhering as bubbles between the tangled filaments. The filamentous masses come to the surface and become visible as slimy green mats.


Simple one..
because it contains chloroplast

Answer 2

because it contains chloroplast