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Plants use abiotic and biotic agents to achieve pollination. Wind and water are main abiotic agents. Wind pollination requires light weight and non sticky pollen grains so that they can be transported in wind currents. They often possess well exposed stamens so that pollens are easily dispersed into wind currents. The stigma is large often feathery to easily trap air-borne pollen grains. Wind pollination is quite common is grasses. Some examples of water pollinated plants  are Vallisneria and Hydrilla which grow in fresh water and several marine seagrasses such as Zostera. In majority of aquatic plants such as hyacinth and water lily, the flower emerge above the level of water and are pollinated by insect  of wind. Among the animals insects particularly bees are dominant biotic pollinating agents. Majority of insects pollinated flowers are large. colorful. fragrant and rich in nector. In some species ,floral rewards are in providing safe places to lay eggs: and example is that of tallest flower Amorphophallus. (the flower itself is about 6 feet in height). A similar relationship exists between sp. of moth and the plant Yucca where both species cannot complete their life cycle without each other.

Which of the following is NOT a feature of insect pollinated plant? 

Light and non sticky pollen grains

The correct answer is Option (1): Light and non sticky pollen grains

Insect-pollinated plants have features that attract insects, such as large, colorful flowers with fragrance and nectar. These features help to ensure that insects will visit the flowers and transfer pollen from one flower to another.

Light and non-sticky pollen grains are not a feature of insect-pollinated plants. These features are more common in wind-pollinated plants, where the pollen grains need to be lightweight and non-sticky in order to be carried by the wind.

The other three features, large and colorful flowers, presence of nectar, and flower with fragrance, are all characteristic of insect-pollinated plants. These features help to attract insects to the flowers, which increases the chances of pollination.

Here is a table summarizing the features of insect-pollinated plants and wind-pollinated plants: