Question

chief pollinating agent against the corresponding plants (a) Dahlia(b) Maize(c) Vallisneria

Answer 1

Pollinating agent of the following plants:

a) Dahlias - dahlias are beautiful flowering plants. The plants of these flowers are pollinated by insects such as bees.
The plants that are pollinated by insects such as the dahlias have very bright flowers which attract these insects.
The insects collect nectar from these flowers and in the process carry the pollen grain from the anthers and move them to the stigma as they move from flower to flower. Dahlia pollinating agent - insects. 

b) Maize - have wind pollinated flowers. The pollen grains are blow from the dangling anthers of the maize cob. The pollen grains are the carried off to the stigma by wind. Maize pollinating agent - wind

c) Vallisneria - these are aquatic plants. The flowers of the valliisneria plant during pollination gain contact to one another by using the surface of the water.
The male anthers spread their pollen grains on the surface of the water film which are the moved by the water to the stigma. Vallisneria pollinating agent - water.

Answer 2

1. The seed pod is the chief pollinating agent for Dahlias.

2. In maize, the pollen from the male anthers of are blown away by the wind, and when they land on the stigma of the female flower, they pollinate.

3. Vallisneria is a dioecious water weed, where the pollination occurs on the surface of the water. The male flowers detach and float on the water to reach the female flowers and they cluster around the female flowers. The anthers from the stamens of the male flower bursts open and the pollen stick on to the stigma of the waxy female flower and pollination occurs.