Abstract
Fertilization the most important process in plant's life cycle is dependent on biological transporters. Biological transporters or Pollinators are the organisms that transport pollen grains from the stamen's anther to the stigma of the carpel. Recent knowledge about pollinators on a global scale investigated that more than 1000000 different animals acts as pollinators for more than 20000 kinds of wild plants (flowering). Beside the different members of class insecta and other invertebrates, more than 1000 vertebrates (birds and mammals) have been reported to have role in pollination. More than 90% species of plants in the tropical areas are dependent on animals or insects for pollination. Mostly self-pollination is done without wind or insects but in certain self-pollinating plants need pollinating agents. On the other hand for cross pollinating plants biological agents/ pollinators are mandatory. Abiotic and biotic methods are used to pollinate plants. Wind (anemophily) and water are the primary means of abiotic pollination (hydrophily). Vertebrate pollination (zoophily) and insect pollination (Entomophily) are the most common forms of biotic pollination.