Question

some flowers are not pollinated by insects but by wind.

Answer 1

its no because colour of flower only attracts insects.

Answer 2

Wind-pollinated flowers have many key differences frominsect-pollinated ones. Since they don't need to attract insects,wind-pollinated flowers tend to have smaller petals, are odorless,are less colorful, and don't have nectar. Examples are ragweed,corn and wheat.