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    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant — Stock Photo
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant
    Crop unrecognizable female with raised arm among blooming yellow flowers on meadow in countryside under cloudy sky — Stock Photo
    Crop unrecognizable female with raised arm among blooming yellow flowers on meadow in countryside under cloudy sky
    Crop anonymous female touching blooming red and yellow flowers on summer meadow in daytime — Stock Photo
    Crop anonymous female touching blooming red and yellow flowers on summer meadow in daytime
    Back view of young female in brassiere with green palm tree foliage behind head looking away on blue background — Stock Photo
    Back view of young female in brassiere with green palm tree foliage behind head looking away on blue background
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree. — Stock Photo
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree.
    Female in hat with eyes closed holding blossoming yellow flowers in countryside field under cloudy sky — Stock Photo
    Female in hat with eyes closed holding blossoming yellow flowers in countryside field under cloudy sky
    Blossoming pink flowers with gentle petals and green leaves in vase on gray background — Stock Photo
    Blossoming pink flowers with gentle petals and green leaves in vase on gray background
    Overhead view of bright green slices of succulent plant leaf representing Christmas tree concept — Stock Photo
    Overhead view of bright green slices of succulent plant leaf representing Christmas tree concept
    Overhead view of bright green slices of succulent plant leaf representing Christmas tree concept — Stock Photo
    Overhead view of bright green slices of succulent plant leaf representing Christmas tree concept
    Dwarf Pebble Flower — Stock Photo
    Dwarf Pebble Flower
    Crop unrecognizable female in bright footwear lying with crossed legs among blossoming daisies under cloudy blue sky in countryside — Stock Photo
    Crop unrecognizable female in bright footwear lying with crossed legs among blossoming daisies under cloudy blue sky in countryside
    Anonymous female in hat covering face with blossoming yellow flowers in countryside field under cloudy sky — Stock Photo
    Anonymous female in hat covering face with blossoming yellow flowers in countryside field under cloudy sky
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower.
    Crop unrecognizable female with raised arm among blooming yellow flowers on meadow in countryside under cloudy sky — Stock Photo
    Crop unrecognizable female with raised arm among blooming yellow flowers on meadow in countryside under cloudy sky
    Woody stem section. Coloured scanning electron micrograph (SEM) of a transverse section through the stem of a woody plant. The majority of tissue seen here is secondary xylem (dark brown) — Stock Photo
    Woody stem section. Coloured scanning electron micrograph (SEM) of a transverse section through the stem of a woody plant. The majority of tissue seen here is secondary xylem (dark brown)
    Blooming Papaver flower with curved tender petals growing on meadow in evening countryside — Stock Photo
    Blooming Papaver flower with curved tender petals growing on meadow in evening countryside
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Female in hat with eyes closed holding blossoming yellow flowers in countryside field under cloudy sky — Stock Photo
    Female in hat with eyes closed holding blossoming yellow flowers in countryside field under cloudy sky
    Chinese hibiscus pollen — Stock Photo
    Chinese hibiscus pollen
    Maize root. Light micrograph (LM) of section through root of maize plant (Zea mays) showing typical monocot arrangement of vascular bundles. central vascular cylinder is comprised of central cluster of parenchyma cells — Stock Photo
    Maize root. Light micrograph (LM) of section through root of maize plant (Zea mays) showing typical monocot arrangement of vascular bundles. central vascular cylinder is comprised of central cluster of parenchyma cells
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background — Stock Photo
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background
    Colorful lily pads growing in freshwater lake — Stock Photo
    Colorful lily pads growing in freshwater lake
    Young ethnic female standing on meadow against palm trees and looking at camera — Stock Photo
    Young ethnic female standing on meadow against palm trees and looking at camera
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant — Stock Photo
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant
    Crop unrecognizable female in bright footwear lying with crossed legs among blossoming daisies under cloudy blue sky in countryside — Stock Photo
    Crop unrecognizable female in bright footwear lying with crossed legs among blossoming daisies under cloudy blue sky in countryside
    Close-up illustration of pollen grain of mimosa and mimosa flowers. — Stock Photo
    Close-up illustration of pollen grain of mimosa and mimosa flowers.
    Chinese hibiscus pollen — Stock Photo
    Chinese hibiscus pollen
    Overhead view of raw chicken eggs on round shaped plate with blossoming Lavandula flowers on purple napkin and marble surface — Stock Photo
    Overhead view of raw chicken eggs on round shaped plate with blossoming Lavandula flowers on purple napkin and marble surface
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree. — Stock Photo
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree.
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis — Stock Photo
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis
    Anonymous female in hat covering face with blossoming yellow flowers in countryside field under cloudy sky — Stock Photo
    Anonymous female in hat covering face with blossoming yellow flowers in countryside field under cloudy sky
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    Crop unrecognizable ethnic female touching blossoming sunflower with pleasant aroma and gentle petals in countryside — Stock Photo
    Crop unrecognizable ethnic female touching blossoming sunflower with pleasant aroma and gentle petals in countryside
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background — Stock Photo
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    Crop anonymous female touching blooming red and yellow flowers on summer meadow in daytime — Stock Photo
    Crop anonymous female touching blooming red and yellow flowers on summer meadow in daytime
    Side view of crop anonymous female harvester touching fresh mandarins growing on green tree in sunlight — Stock Photo
    Side view of crop anonymous female harvester touching fresh mandarins growing on green tree in sunlight
    Crop unrecognizable female with raised arm among blooming yellow flowers on meadow in countryside under cloudy sky — Stock Photo
    Crop unrecognizable female with raised arm among blooming yellow flowers on meadow in countryside under cloudy sky
    Green corn leaves — Stock Photo
    Green corn leaves
    Lily pads in shallow freshwater lake — Stock Photo
    Lily pads in shallow freshwater lake
    Overhead view of raw chicken eggs on round shaped plate with blossoming Lavandula flowers on marble surface — Stock Photo
    Overhead view of raw chicken eggs on round shaped plate with blossoming Lavandula flowers on marble surface
    Colored scanning electron micrograph of pollen grains from convolvulus flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from convolvulus flower.
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background — Stock Photo
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Crop anonymous person with bright blossoming African daisy with tender petals on hand on gray background — Stock Photo
    Crop anonymous person with bright blossoming African daisy with tender petals on hand on gray background
    Young sincere female with hair bun looking at camera near green plant leaf on beige background — Stock Photo
    Young sincere female with hair bun looking at camera near green plant leaf on beige background
    Blossoming pink flowers with gentle petals and green leaves in vase on gray background — Stock Photo
    Blossoming pink flowers with gentle petals and green leaves in vase on gray background
    Lily pads in shallow freshwater lake — Stock Photo
    Lily pads in shallow freshwater lake
    Colorful lily pads growing in freshwater lake — Stock Photo
    Colorful lily pads growing in freshwater lake
    Young sincere female with hair bun looking at camera behind green plant leaf on beige background — Stock Photo
    Young sincere female with hair bun looking at camera behind green plant leaf on beige background
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis — Stock Photo
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis
    Crop anonymous female touching blooming red and yellow flowers on summer meadow in daytime — Stock Photo
    Crop anonymous female touching blooming red and yellow flowers on summer meadow in daytime
    Crop unrecognizable female with raised arm among blooming yellow flowers on meadow in countryside under cloudy sky — Stock Photo
    Crop unrecognizable female with raised arm among blooming yellow flowers on meadow in countryside under cloudy sky
    From below of palm trees with wavy green and faded branches growing in Tenerife Spain — Stock Photo
    From below of palm trees with wavy green and faded branches growing in Tenerife Spain
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower.
    Female in hat with eyes closed holding blossoming yellow flowers in countryside field under cloudy sky — Stock Photo
    Female in hat with eyes closed holding blossoming yellow flowers in countryside field under cloudy sky
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.