because, they are mainly wind pollinated and don't require bright flowers to attract insects
Bright colors and strong odors attract insects to a plant to assist with pollination. Grasses and grains are wind-pollinated, so there is no need for these colors and odors.
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flowers
the flowers people buy reproduce and send out other seeds to plant flowers
To attract insects and encourage pollination to result in more flowers growing.
Many colors have brightly-colored flowers; the purpose of this is to attract insects, which assist the plant in pollination.
Many colors have brightly-colored flowers; the purpose of this is to attract insects, which assist the plant in pollination.
Most bees only go for brightly coloured flowers etc: roses
Flowers are brightly colored to attract other insects and animals. This is a mode of pollination through agents like insects and animals. When the insects come in contact of the flower, the pollen grains stick to their feet and are transferred to another plant.
Nemesia
Brightly coloured petalsThe smellNectar
fresh brightly coloured adult flowers attract most bees
Flowers are either brightly coloured or scented or both to attract the insects that pollinate them.
the brightly colored petals help attract some agent like bees and insect which helps the flowers to polinate