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    Root vascular tissue, light micrograph. — Stock Photo
    Root vascular tissue, light micrograph.
    Pollen grains of mimosa flower, digital illustration. — Stock Photo
    Pollen grains of mimosa flower, digital illustration.
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (blue) and large intercellular air spaces (holes). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (blue) and large intercellular air spaces (holes).
    Light micrograph (LM). Longitudinal section through the thallus and sporangium of a liverwort (Pellia epiphylla). — Stock Photo
    Light micrograph (LM). Longitudinal section through the thallus and sporangium of a liverwort (Pellia epiphylla).
    Bottlebrush pollen grain — Stock Photo
    Bottlebrush pollen grain
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration. — Stock Photo
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration.
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    Plant cells, 3d illustration — Stock Photo
    Plant cells, 3d illustration
    Midrib of a tea leaf — Stock Photo
    Midrib of a tea leaf
    Colored scanning electron micrograph of pollen grains from marigold flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from marigold flower.
    Chinese hibiscus pollen — Stock Photo
    Chinese hibiscus pollen
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium stem, showing numerous vascular bundles (such as at upper centre) with an inner xylem (pink) and outer phloem (yellow).
    Onion cells undergoing mitosis — Stock Photo
    Onion cells undergoing mitosis
    Abutilon sp. pollen grain — Stock Photo
    Abutilon sp. pollen grain
    Strawberry pollen grain — Stock Photo
    Strawberry pollen grain
    Marsh marigold carpel — Stock Photo
    Marsh marigold carpel
    Geranium pollen grain — Stock Photo
    Geranium pollen grain
    Light micrograph of a longitudinal section of plant vascular tissue. — Stock Photo
    Light micrograph of a longitudinal section of plant vascular tissue.
    Phlox pollen grain — Stock Photo
    Phlox pollen grain
    Milkwort pollen grain — Stock Photo
    Milkwort pollen grain
    Angel trumpets pollen — Stock Photo
    Angel trumpets pollen
    Bottlebrush pollen grain — Stock Photo
    Bottlebrush pollen grain