For 10 points, name these "biological clocks" that govern activities that repeat roughly every 24 hours.
They are controlled by the PER and TIM proteins, and they can be lost if the pineal gland is removed from birds. In fungi and protists, they are a property of individual cells, and in mammals, they are controlled by the (*) suprachiasmatic nuclei. They can be either free-running or entrained by zeitgebers, such as a cycle of light and dark. For 10 points, name these "biological clocks" that govern activities that repeat roughly every 24 hours.
They are controlled by the PER and TIM proteins, and they can be lost if the pineal gland is removed from birds.
{circadian} rhythms