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Micrografia de um grão de pólen

A scanning electron micrograph of a single lily pollen grain, featuring a reticulate wall with raised ridges and sunken pits, and a prominent central furrow, false-colored in gold against a dark charcoal background.

A lily pollen grain in a scanning electron micrograph, its reticulate wall a net of raised ridges over sunken pits, one long furrow running down the grain, false-coloured warm gold on charcoal, 2500x magnification Ver mais

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A scanning electron micrograph shows numerous spiky, mustard-yellow pollen grains scattered against a dark background, with one smooth, tricolpate grain positioned near the center.

A scanning electron micrograph of an insect antenna, showing a central shaft with numerous fine, branching sensory hairs and a pitted cuticle surface.

A scanning electron micrograph of a gecko toe pad showing rows of curved lamellae covered in dense, branching setae with spatula-like tips, false-colored in teal against a dark charcoal background.

A microscopic view of a circular, symmetrical diatom shell featuring intricate geometric patterns and iridescent light effects against a dark blue background.

A single Purkinje neuron with an extensive, tree-like dendritic arbor extending from a central cell body, captured in a Golgi stain against a warm amber background.

A circular diatom shell with intricate geometric patterns and a glass-like structure is displayed against a solid black background in a dark-field microscopy style with blue and white highlights.

A scanning electron micrograph of the underside of a hydrangea leaf showing multiple open stomatal pores, pavement cells, and a single trichome.

A close-up macro photograph of a polished and etched iron meteorite slice displaying a distinct Widmanstätten pattern of intersecting metallic bands, set against a dark background with side lighting.

A microscopic view of squid skin showing vibrant ruby, amber, and brown chromatophores scattered across a translucent surface with iridescent blue cells.

A top-down macro photograph of a green sea urchin test, showcasing its intricate radial symmetry, rows of tubercles, and central apical system against a neutral gray background.

A macro close-up shot of honeycomb toffee, showcasing its intricate, porous structure with glassy amber walls and numerous air bubbles illuminated by warm light.

A 3D digital illustration of a cell in prophase, featuring condensed purple chromosomes, a fading nuclear envelope, and two green spindle poles with radiating fibers inside a translucent cell on a pale blue background.

A translucent amber swell shark egg case is attached to a dark kelp holdfast underwater, illuminated from behind to reveal the developing embryo and yolk inside.

A close-up view of honeycomb weathering in sandstone rock, illuminated by golden sunset light that casts deep shadows into the hollows.

A close-up macro photograph of a dried poppy seed capsule against a dark background, illuminated by side lighting that casts shadows from the ribbed crown.

A close-up view of a giant water lily leaf with a spiny, purple-veined underside, partially curled and illuminated by golden sunrise light against dark water.

An aerial view of a camel caravan traveling along a sandy ridge in a desert at sunrise, casting long shadows across the dunes.

A long, translucent siphonophore drifts through the dark, deep ocean, illuminated by faint internal bioluminescence amidst falling marine snow.

A high-magnification scanning electron microscope image of a textured, spherical pollen grain against a black background, featuring selective false-color highlights in pink, orange, and blue.

A microscopic view of various diatoms, including circular centric frustules and elongated needle-like shapes, glowing in white and pale blue against a solid black background.

A scanning electron micrograph of Penicillium mould, showing upright stalks ending in brush-like heads with chains of round spores, set against a black background with a 200-micrometer scale bar.

A scanning electron micrograph of a circular Coscinodiscus diatom featuring intricate glass lattice patterns and radial symmetry, rendered in iridescent teal and violet against a black background.

A macro close-up of a pale lime green, feathery insect antenna with delicate, comb-like sensory hairs against a solid black background.

A dense, stippled pen and ink illustration of a large cluster of ladybirds overwintering on a textured rock surface, with light catching their wing cases.

A high-angle close-up of a grey limestone slab densely packed with fossilized crinoid stems and feathery crowns, illuminated by low-angle sunlight that highlights the textures against patches of green moss.

A circular spherulite of vitamin C crystals, featuring radiating needles in vibrant shades of blue, gold, and magenta, is bisected by a dark cross against a black background as seen through a polarizing microscope.

A microscopic cross-section of a plant stem showing a ring of vascular bundles arranged around a central hollow pith, stained in vibrant crimson and turquoise against a white background.

A microscopic view of plant cells featuring vibrant magenta cell walls and numerous glowing green chloroplasts.

A high-resolution image of the Sun's disc showing multiple sunspot groups across both hemispheres, with visible limb darkening and bright faculae near the edges.

A scanning electron micrograph of a moth antenna, showing a central stalk with branching, hair-like sensory structures in shades of green.

A cross-section of a paper-wasp nest with visible hexagonal honeycomb layers and a papery outer shell, illuminated by raking light against a solid black background.

A macro close-up of soap foam bubbles with iridescent magenta, gold, and green swirling films against a dark background, illuminated by soft light from the left.

A high-angle black and white photograph of hexagonal basalt columns, with low-angle sunlight highlighting the rims and casting deep shadows in the crevices.

A close-up view of a sunspot pair on the solar surface, featuring dark umbrae surrounded by grey penumbral filaments, with a bright, snaking flare ribbon connecting the spots against a background of golden solar granulation.

A dense bed of purple sand dollars stands on edge in the sandy seafloor of Puget Sound, illuminated by shafts of afternoon sunlight filtering through the green water.

A close-up, macro view of a dried sunflower head with black seeds covered in frost, surrounded by brittle, bronze-colored petals against a bright, overcast background.

A scanning electron micrograph of a single, spiny, spherical pollen grain resting on a smooth, dark surface with a scale bar in the bottom right corner.

A high-resolution close-up view of a sunspot group on the solar surface, featuring dark umbrae, a fibrous penumbra, and bright flaring kernels surrounded by golden solar granulation.

A microscopic view of Allium cepa plant cells, stained with iodine to reveal their rigid cell walls and prominent nuclei.

A microscopic bdelloid rotifer is captured in differential interference contrast, showing its transparent body, internal jaw structure, and twin ciliated crowns against a grey-blue background.

A circular view through a microscope lens displays a layered paper-cut art piece featuring various desmids, diatoms, and a green algal filament, all backlit to create a glowing, translucent effect.

A microscopic copepod with a translucent, segmented body and long, feathery antennae, carrying two amber-colored egg sacs, is illuminated against a dark blue background.

A yellow slime mold with a branching, vein-like network spreads across the surface of dark, damp tree bark, viewed through a circular microscope field of view.

A close-up macro shot of a fossilized trilobite eye, showing the honeycomb-like structure of individual calcite lenses set against dark, textured shale.

A scanning electron micrograph of a single tardigrade on a smooth surface, showing its segmented body, eight clawed legs, and wrinkled cuticle under side lighting.

A dried, frost-covered lotus seed head stands above dark, frozen water in a muted, monochromatic winter setting.

A thin section of a chondrite meteorite viewed under cross-polarized light, showing colorful, circular chondrules embedded in a dark matrix.

A scanning electron micrograph shows the overlapping, shingle-like scales of a butterfly wing, with one scale broken to reveal its hollow interior structure.

A macro close-up of a single black peppercorn with a textured, shriveled surface, illuminated by cool blue light against a dark background.

A white-spotted pufferfish rests in the center of a large, intricate circular pattern carved into the sandy seafloor, illuminated by sun caustics in clear blue water.

A close-up view of metallic, dendritic copper structures branching inward toward a central light source, featuring salmon-colored ridges and green verdigris in the crevices against a black background.

$A detailed hexagonal snowflake with concentric ridges and intricate corner structures, captured against a dark background with subtle light refraction.$

A close-up macro view of a flower stamen covered in thick, granular orange pollen with a visible smear on the filament.

A high-contrast white ink line art illustration on a black background depicting the intricate, radiating vein structure of a giant water lily leaf.

A microscopic view of a single centric diatom, featuring a circular, glass-like valve with radiating ribs and a marginal ring of pores, captured using differential interference contrast microscopy on a neutral grey background.

A cluster of triangular Triceratium diatoms with intricate, perforated silica structures glowing in gold and violet against a solid black background.

A stylized, high-contrast risograph print in fluorescent pink and teal depicting a biological cell undergoing anaphase, with two sets of chromosomes being pulled apart by spindle fibers.

A microscopic radiolarian skeleton with a spherical, hexagonal lattice structure and long, radiating spines, glowing in white and ice blue against a solid black background.

A detailed silk embroidery on midnight blue satin depicting a cell undergoing mitosis, featuring gold-threaded chromosomes and pale silk spindle fibers, captured in a flat, square-on view.

A high-contrast view of a sunspot group on the solar photosphere, showing dark umbral cores, filamentary penumbrae, and surrounding granulation with bright faculae near the limb.

A close-up, top-down view of a sunflower head showing dense, spiraling seeds with some gaps, illuminated by raking light that creates distinct shadows.

An aerial view looking straight down at a dense, circular flock of thousands of pink flamingos standing in the shallow, multi-colored waters of a lake, surrounded by swirling patterns of red and green algae.

A top-down view of a brain coral with intricate maze-like ridges and grooves, illuminated by sunlight filtering through shallow water.

A microscopic cross-section of a plant stem showing vascular bundles with red-stained xylem and blue-stained phloem, illuminated by brightfield light.

A microscopic view of plant cells showing bright green chloroplasts within defined cell walls, illuminated against a dark background.

A microscopic view of a circular, radially symmetrical diatom with intricate silica ribs and areolae, illuminated against a black background.

A detailed trilobite fossil, likely Elrathia kingii, is embedded in a piece of dark grey shale, captured in a top-down macro shot.

A pale green, ribbed butterfly egg sits on a textured, hairy nettle leaf under soft, natural lighting.

A detailed botanical watercolor illustration of a plant cell featuring a large central vacuole, a nucleus, chloroplasts, and other organelles within a rigid cell wall.

A thin section of gabbro viewed under crossed polarized light, showing twinned plagioclase crystals with grey and white stripes alongside pyroxene grains displaying vibrant green and magenta interference colors.

A microscopic view of plant cells featuring vibrant neon violet nuclei and electric lime cell walls.

A macro photograph of a polished ammonite fossil, displaying intricate spiral chambers filled with amber-colored crystalline structures, illuminated by warm light.