Definition
A spore is a reproductive cell, similar to a seed, but typically single-celled and simpler. Think of it as a tiny package of genetic material ready to grow. Spores are used by fungi, ferns, mosses, and some bacteria. They're often very resistant to harsh conditions, allowing them to survive for long periods. Unlike seeds, spores do not contain an embryo. They're dispersed widely by wind, water, or animals. They are essential for the propagation of many organisms.