life cycle and lateral conjugation of spirogyra charophyte green algae

algae anatomy background biology cell charophyte chlorophyta chloroplast conjugation cycle cytoplasm diagram drawing ectoplasm endoplasm eukaryotic green illustration isolated lateral life meiosis membrane micro microbiology microorganism nucleolus nucleus organelle organism process protist protista protozoa pyrenoid schema scheme sequence single spirogyra stage stages structure unicellular vector white zygospore