AP BIOLOGY

Detailed explanation-1: -The response to light that some insects experience is called phototaxis. This means that the whole body of the organism will move toward or away from light. Moths are the classic example; they are positively phototactic.

Detailed explanation-2: -Phototaxis is a kind of taxis, or locomotory movement, that occurs when a whole organism moves towards or away from a stimulus of light. This is advantageous for phototrophic organisms as they can orient themselves most efficiently to receive light for photosynthesis.

Detailed explanation-3: -It is the movement of organism or cell in response to light whether in the direction of light( positive phototaxis) or in the opposite direction ( negative phototaxis). Most nocturnally active moths are attracted to light, a phenomenon known as positive phototaxis.

Detailed explanation-4: -Examples of phototrophic organisms exhibiting phototaxis are the phytoflaggellates, e.g. Euglena, and photosynthetic bacteria. A negative phototaxis is one in which the organism moves away from the light source as demonstrated by certain insects such as cockroaches.