In water hyacinth and water lily,pollination takes place by

An interesting modification of flower shape for insect pollination occurs in some orchids in which a male insect mistakes the pattern on the orchid flower for the female of his species and tries to copulate with it,thereby pollinating the flower. This phenomenon is called

$A$ close relation between flower and pollinating agent is best exhibited by

Pollen kit is present in

Ornithophily refers to the pollination by which of the following?

Which plant provides a safe place for pollinators to lay eggs as a floral reward?