The term which is not related to the process of evolution of leaf is:

Explanation

"Heterospory" is a term related to the reproductive structures of plants and is not directly associated with the process of leaf evolution. Heterospory refers to the production of two different types of spores by a plant, typically male and female spores. This reproductive strategy is common in certain groups of plants, such as seed plants (including gymnosperms and angiosperms).