Exam: GRE (Verbal)

Definition: A chemical process where a substance loses an electron when exposed to light and oxygen, leading to oxidation.

Example: Photooxidation is an important process in photosynthesis, helping plants convert light energy into chemical energy.

Definition: Relating to a process that involves the chemical reaction of light with a substance, leading to oxidation.

Example: The photooxidative process is essential in understanding how plants convert sunlight into energy.

Definition: A regular cycle of light and darkness that occurs over a specific period, often related to the length of day and night.

Example: Plants use the photoperiod to determine when to flower and grow.

Definition: Relating to the response of organisms to the length of day and night, especially in terms of growth and reproduction.

Example: Many plants are photoperiodic, meaning they flower based on the amount of light they receive each day.

Definition: The time during a day when there is light, typically referring to the light part of a cycle that includes both light and dark periods.

Example: Plants use the photophase to perform photosynthesis during the day.

Definition: A condition where a person has an unusual sensitivity or fear of light, often causing discomfort or pain in bright environments.

Example: People with photophobia may need to wear sunglasses even indoors to avoid discomfort from bright lights.

Definition: Describing something that avoids light or is sensitive to light.

Example: Some plants are photophobic and thrive in dark environments.

Definition: A special organ in some marine animals that produces or emits light, often found in deep-sea fish.

Example: The anglerfish uses its photophore to attract prey in the dark ocean depths.

Definition: Relating to vision that occurs in bright light, particularly when the eyes are adapted to such conditions, and primarily involves the cone cells in the retina.

Example: The photopic vision allows us to see colors clearly during the day.

Definition: A type of plastic that changes when exposed to light, often used in dental fillings and for making printing plates.

Example: The dentist used a photopolymer to fill the cavity in my tooth.