One of the following statement is NOT true of spirogyra

• A.it is a simple multicellular plant
• B.during conjugation, its gametes, which are structurally and physiologically similar, fuses to form a zygote
• C.it possesses spiral chloroplast which enables the plant to photosynthesize
• D.its cells are protected externally by layer of mucilage
• E.there are pyrenoids along the chloroplast