The organisms that help in the transfer of pollen grains are called _____.
pollinators
Pollinators are orgnisms which are capable of moving or transporting pollen grains from the anther of a flower to the stigma of another flower for fertilisation to take place in the ovules of the flower. Insects, like bees, wasps, ants, butterflies, etc. and other animals like bats, birds, humans, etc. are examples of pollinators.