Question

Winged pollen grains are found?
A. Cycas
B. Mango
C. Pinus
D. Dryopteris

Answer 1

Hint:Pollen grains are small, microscopic structures. They are the haploid microgametophyte or macro gametophyte. Pollen grains carry the male reproductive cells of plants.

Complete answer:
Winged pollen grains are found in Pinus. Anther is the male gamete in the plant. Pollen grain is the male gametophyte or macro gametophyte phase of plants. Pollen grains are produced by meiosis of microscope mother cells that are located in microsporangia. Pollen grain consists of three main components namely cytoplasm, exine and intine. Pollen grains come in a wide variety of shapes, sizes and surface markings characteristics of species. Most of the pollens are spherical but some come in a wide variety of shapes. Pollen grains of pines, firs and spruces are winged. Pollen grains take part in pollination which is followed by fertilization. The different agents of pollination are wind, air, water, insects, bats etc. Pollination on the basis of transfer of pollen grain can be classified into self-pollination and cross pollination.
(a) Self-pollination: The transfer of pollen grains from anther to the figure of the same flower of the same plant of the same species is called self-pollination.
(b) Cross-pollination: The transfer of pollen grains from anther to s figure of different flowers of different plants to same species or different species is called cross-pollination. Cross-pollination leads to evolution or introduction of new characters.

Hence the correct answer is option (C). Pinus.

Note:Pollen grains are also known as microspores. They take part in pollination anemophily. Hydrophily chiropterophily etc are different modes of pollination.