The suprachiasmatic nucleus of the is responsible for regulating your circadian rhythms. In this way it plays a very important role in your sleep-wake cycle.

tiny region of the brain in the hypothalamus, situated directly above the optic chiasm.

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.