why pollen grain comes in different shapes and sizes???
Answers
Answer:
Pollen grains of wind-pollinated flowers are produced in large quantities to make sure that at least some pollen grains reach the stigmas of other flowers and successful pollination takes place as many pollen grains are wasted. These pollen grains are light and hence are easily transferred to other flowers.
Answer:
Characteristic # 1. Pollen Units:
The pollen grains are produced within the anther of the flower. Pollen mother cells originate from the sporogenous tissue of the anther which
Pollen units
Dyads:
Pollen grains which are united in pairs and shed from the anthers as doubles are called dyads (Fig.4.1). Dyads are present in Scheuchzeria palustris and other members of Podostemonaceae. The dyads are formed due to the incomplete break up of individual grain or monad.
Explanation: