Q.Write any three differences between anemophilous and entomophilous flower. What is polyembryony? Give example. OR Describe in brief the male reproductive system of human with labelled diagram.

Pollination is achieved either abiotically (wind, water) or biotically (insects, birds, bats, and occasionally other animals), and flowers show clear adaptations to their agent. Wind-pollinated (anemophilous) flowers, such as grasses and maize, are usually small, inconspicuous, produce enormous quantities of light, non-sticky pollen, have well-exposed versatile anthers and large, feathery stigmas to trap airborne pollen. Water-pollinated (hydrophilous) flowers are few (e.g. Vallisneria, Zostera); pollen may be released to float on the water surface or be released underwater in long ribbon-like ropes, often protected by a mucilaginous covering. Animal-pollinated flowers are generally large, colourful, fragrant, and offer nectar or pollen as a reward; bat-pollinated flowers (e.g. Kigelia, Adansonia) open at …