Living things have a range of conditions that are optimal for survival. Living things respond to daily, seasonal, and long-term changes in their environment to survive.
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Some plants and animals can better survive adverse environmental conditions through periods of dormancy. Dormancy occurs when normal physical functions are slowed down or suspended (LS.8 a).
A circadian rhythm is a roughly 24-hour cycle in the physiological processes of living things, including plants, animals, fungi, and cyanobacteria. This cycle aids life processes (LS.8 a).
To survive, plants require light and water for photosynthesis. Plants have developed responses, called tropisms, to help ensure they grow toward adequate sources of light and water (i.e., phototropism and geotropism) (LS.8 a).