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Blank Book on white background.
Nicaragua highlighted in red on planet Earth with visible waves in the oceans and clouds in the atmosphere. 3D illustration with detailed planet surface. 3D model of planet created and rendered in Cheetah3D software, 7 Mar 2017. Some layers of planet surface use textures furnished by NASA, Blue Marble collection: http://visibleearth.nasa.gov/view_cat.php?categoryID=1484
Cotton plant root, under the light microscope. Longitudinal section through the root of Gossypium hirsutum, upland or also Mexican cotton. Light micrograph at 20X magnification. Isolated, over white.
Vintage green school book (printed at the beginning of the 20th century) with a blank name label. Isolated on a white background.
Epidermis. Electron microscope micrograph showing a keratinocyte of spinous layer. The epithelial cell has a polygonal shape, central nucleus with nucleolus, cytoplasm full of keratin filament bundles, and numerous dark desmosomes crossing the intercellular spaces.
Fresh ripe lotus seeds isolated on white background
plant Flower bud of Lilium brownii var.viridulum T.S.\nunder light mircoscope with white background
Dicot plants stem show plant vascular tissue under light microscope view for botany education.
Aerial view of loyster farm by Ardara, County Donegal - Ireland.
Brazil flag waving
Leiden leaf c.s. under microscope
Drawing of a card pinned to antique paper texture full frame.
Diatoms, algae under microscopic view, phytoplankton, fossils, silica, golden yellow algae
Red tile isolated on white background
Representatives of the Lemnaceae, the duckweed family, are well-adapted for use as bioindicators for testing soil and water for toxic substances.  Their rapid multiplication and the simplicity of their anatomy are important advantages for this use.
plant rape flower cross section under light mircoscope with white background
Cross section leaf of plant under the light microscope view for botany education.
Big green isolated tropical leaf
Computer folder icon with Brazilian flag. 3D rendering isolated on white background
Photomicrograph of filamentous blue-green algae, Oscillatoria species. Each band along the stand is one cell. This filament is very short probably having recently parted from a longer one. Filaments are typically many times longer. This algae is mobile, it moves and twists through the water. San Francisco Bay, California, USA. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination. Note - motion blur of live specimen, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.
Microalgae under microscopic view, green algae, cyanobacteria, phytoplankton, diatom, algae mix collage background
Old book isolated with clipping path. Very high resolution and lot of details.
amazing inhabitants of the microworld under a microscope
Standing white blank book isolated on white background with Clipping path.
top marble long table isolated on white background
fish skin under light microscope with white background
Leiden leaf c.s. under microscope
Antique black hardcover book.
Algae, a unicellular organism, Amphora sp.
Mango tree leaf abstract on a farm at Caniaba near Lismore, NSW, Australia
Free Images: "bestof:Senna tora Blanco1.122.png Plate from book Flora de Filipinas Gran edicion Atlas I http //bibdigital rjb csic es 1880-1883 Francisco Manuel Blanco O S A PD-old"
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