EVERYDAY SCIENCE

Detailed explanation-1: -Rejuvenating spores of diatoms are Auxospores. In certain species of diatoms, auxospores are specialised cells that are produced at key stages in their cell cycle or life history. They typically play a role in growth processes, sexual reproduction or dormancy.

Detailed explanation-2: -aux·o·spore. ˈȯksəˌspō(ə)r. plural-s. : a reproductive cell in diatoms usually resulting from the union of two smaller cells or their contents and associated with rejuvenescence in cells that have become progressively smaller because of repeated divisions.

Detailed explanation-3: -Auxospores are also called as rejuvenescent cells as they form during cell division. Sporozoans have a complex life cycle. Sporozoans are the infective spores that can reproduce both by sexual and asexual mode. They are formerly placed in the class of sporozoa and also called as apicomplexans.

Detailed explanation-4: -Diatoms divide vegetatively, but after each division cycle, the average size of diatom cells in the population gets smaller. Once cells reach a certain minimum size, they reverse this decline by forming an auxospore, a process that requires sexual reproduction.