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47.6 MB (2.9 MB compressed)
5035 x 3306 pixels
42.7 x 27.9 cm ⏐ 16.8 x 11.0 in (300dpi)
R.B. TAYLOR / SCIENCE PHOTO LIBRARY R.B. TAYLOR / SCIENCE PHOTO LIBRARY
Light micrograph (Spectral-Rheinberg contrast) of a single desmid, Micrasterias sp. , showing the elaborate, convoluted shape of the cellulose layer surrounding the two chloroplasts, and the division of the desmid into left & right halves. The term desmids is applied to a group of genera of green algae that show great morphological variety but are related by common features of cell structure and method of reproduction. Most desmids are unicellular, with a single nucleus and one or more chloroplasts (the site of photosynthesis within the cell). The cell walls all have a inner layer rich in cellulose & an outer, thickened pectin layer. Magnification: X 400 at 35mm size.
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