Kaplan Nursing Entrance Exam Practice 2026 – Comprehensive Prep

Male gametophytes in plants are formed from spores produced by the sporophyte generation, which is the diploid phase of the plant life cycle. The process begins with the development of microspores through meiosis in the anthers of the flowers. These microspores then undergo mitosis to form pollen grains, which are the male gametophytes. Each pollen grain contains the necessary structures for reproduction, including the generative cell, which can divide to form sperm cells.

The other options focus on different aspects of plant reproduction. For example, ovules found in the pistil relate to female gametophyte development, not male. The endosperm fusion is a process that occurs after fertilization, contributing to the nutritional support of the developing embryo. Fertilized seeds represent a mature structure containing both male and female contributions but do not pertain to the formation of the male gametophyte specifically. By understanding that male gametophytes derive directly from spores produced by the sporophyte, a clearer picture of plant reproductive biology is formed.