How does a planaria respond to changes in their environment?

Planaria, a type of flatworm, respond to environmental changes through various behaviors and physiological adaptations. They can exhibit positive or negative taxis, moving toward favorable conditions (like light or food) or away from harmful stimuli (such as extreme temperatures or toxins). Additionally, planaria possess a simple nervous system that allows them to process sensory information and adjust their movements accordingly, enabling them to navigate their environment effectively. Their regenerative capabilities also allow them to adapt physically to environmental challenges over time.