silhouette of chlorella single-celled green algae

algae anatomy animal background biology cell celled chlorella chlorophyta chloroplast cytoplasm diagram ectoplasm endoplasm eukaryotic eyespot graphic green illustration isolated membrane micro microbiology microorganism nucleolus nucleus organelle organism protist protista protozoa protozoan pyrenoid schema scheme silhouette single stigma structure unicellular vector vulgaris white zoology