REM–nonREM sleep cycle is an example of:
Ultradian rhythm reflects key principle in quiz on behavior pyqs solved-section f, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Ultradian rhythm aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Ultradian rhythm fits helps integrate natural selection, environment.
Ref: Alcock, Animal Behavior, Inclusive Fitness and Haplodiploidy.
