Life Cycles
A life cycle is a period including all various generations of a species succeeding each other by means of reproduction, therefore by asexual reproduction or sexual reproduction (a period from one generation of organisms to the same identical).
The Archaeplastida (or Plantae sensu lato) are a main collection of eukaryotes comprising the green and red algae and the land plants together with a short group called the glaucophytes. The plastids or chloroplasts of all of these organisms are surrounded through two membranes, suggesting they establish directly from endosymbiotic cyanobacteria. In all other collection plastids are surrounded through three or four membranes suggesting they were acquired secondarily from red or green algae.