Final answer:
Male and female reproductive structures in a flower include stamens and carpels respectively. A flower has four main whorls named calyx, corolla, androecium, and gynoecium. Complete flowers have all four whorls, while incomplete flowers lack one or more whorls.
Step-by-step explanation:
A complete flower consists of male and female reproductive structures. The male reproductive structures are called stamens and include the anthers, which produce pollen, and the filaments, which support the anthers. The female reproductive structures are called carpels and consist of the stigma, which receives pollen, the style, which connects the stigma to the ovary, and the ovary, which contains the female gametes.
Plants have a two-stage lifecycle consisting of the gametophyte stage and the sporophyte stage. The gametophyte stage involves the production of gametes through meiosis. In flowering plants, the gametophyte stage is represented by the pollen grains and the embryo sac. The sporophyte stage involves the development of the embryo and the production of spores through meiosis.
The four main parts, or whorls, of a flower are the calyx, corolla, androecium, and gynoecium. The calyx consists of sepals, which protect the unopened bud. The corolla consists of petals, which are usually brightly colored to attract pollinators. The androecium contains the male reproductive structures, including stamens. The gynoecium contains the female reproductive structures, including carpels.
A complete flower contains all four whorls: calyx, corolla, androecium, and gynoecium. An incomplete flower lacks one or more of these whorls. Incomplete flowers may lack either the calyx and corolla, the androecium, or the gynoecium. These differences can affect a flower's ability to reproduce and attract pollinators.