The correct option is (c).
Explanation
The pollen tube is a tubular outgrowth produced by the pollen grain (male gametophyte) in seed plants. It acts as a conduit to transport male gametes cells from the pollen grain to the ovule for fertilization.- Statement 1 is Incorrect: The pollen tube does not develop from the ovule; it develops from the pollen grain. Furthermore, this development occurs after pollination, specifically after the pollen grain lands on a compatible stigma and begins to germinate.
- Statement 2 is Correct: The primary function of the pollen tube is to grow through the tissues of the stigma and style to reach the ovary. It carries the male gametes (sperm cells) to the ovule, where they are released into the embryo sac.
- Statement 3 is Correct: The formation and growth of the pollen tube are essential steps in the process of fertilization in flowering plants (angiosperms) and gymnosperms. Therefore, it is a critical structure involved in sexual reproduction.
Key Takeaway: The pollen tube is an extension of the male gametophyte (pollen grain) formed after pollination to facilitate siphonogamy-the transport of non-motile male gametes to the female gamete within the ovule.