Kaplan Nursing Entrance Practice Exam

Which elements are involved in the formation of male gametophytes?

1. Petals and sepals

2. Spores from sporophytes

3. Styles and stigma

4. Fibers and ovules

The correct answer is: Spores from sporophytes

The formation of male gametophytes involves the development of spores from sporophytes. In the life cycle of plants, the sporophyte generation is diploid and produces haploid spores through a process called meiosis. These haploid spores then undergo mitosis to develop into male gametophytes, which can subsequently participate in fertilization. The other options relate to different parts of plant anatomy that do not contribute directly to the formation of male gametophytes. Petals and sepals are involved in the structure of flowers and may play a role in attracting pollinators, but they do not directly relate to gametophyte formation. Styles and stigmas are parts of the female reproductive organ, associated with pollen reception and fertilization, while fibers and ovules refer to supportive structures and female gametes within the reproductive system. Thus, the correct answer highlights the essential role of spores in the lifecycle of plants, specifically in the development of male gametophytes.