Im not 100% sure but the best answer I can give is Prokaryotes because they came to be around the time oxygen did as well.
The brain's suprachiasmatic nucleus regulates the body's circadian rhythms. The suprachiasmatic nucleus is a minute region of the brain located in the hypothalamus above the optic chiasm, the circadian rhythm is the 24-hour cycle of organisms, related to sunlight and temperature.
Answer:
A plant that becomes limp through heat, and loss of water,
Explanation:
