REPRODUCTIVE CELLS that are used as AGENTS of asexual REPRODUCTION. This germination produces the entire organism. Spores are produced by bacteria, fungi, algae, and plantsBased on the presence of similar or dissimilar spores plants can be divided into two types Homosporous plants - When there is a production of similar types of spores in a single plant, this condition is called homospory, and the plants are called homosporous plants. The STRUCTURE, formation, and functions of these spores are similar.Heterosporous plants - When there is a production of different types of spores in a single plant, this condition is called heterospory, and the plants are called heterosporous plants. The structure, formation, and functions of these spores differ.Explanation:Marsilea exhibits heterospory i.e two different types of spores are produced in the plant - microspores & the megasporesMicrospores are male spores that are smaller in size and larger in number. Microspores are produced in Microsporangium.Megaspores are the female spores that are larger in size and smaller in number. Megaspores are produced in Megasporangium, these spores on germination produce the female gametophyte Heterospory in pteriodophytes is shown by Selaginella, Isoetes, Marsilea, Salvinia, Azolla, Pilularia, etc.Psilotum, Adiantum, and Pteris are Homosporous.