Reproductive cycles refer to the series of physiological changes that occur in organisms to prepare for reproduction. In animals, these cycles can vary widely, with some species exhibiting seasonal breeding patterns, while others may breed year-round. The cycle typically includes phases such as estrus, ovulation, and gestation, which are influenced by hormonal changes. In plants, reproductive cycles involve processes like flowering and seed production. These cycles are often triggered by environmental factors such as light and temperature. For example, angiosperms may have specific flowering times to ensure successful pollination and seed dispersal, aligning their reproductive efforts with favorable conditions.