Examlex
Sigmund Freud held that the ego operates on the _____ principle,the regulating mechanism that enables the individual to delay the gratification of immediate needs and operate effectively in the world.
Dormancy
A period in an organism's life cycle when growth, development, and physical activity are temporarily stopped to conserve energy during unfavorable environmental conditions.
Abscisic Acid
A plant hormone that regulates growth and development, and mediates stress responses such as drought tolerance.
Gibberellin
Plant hormone promoting increased stem growth; also involved in flowering and seed germination.
Phytochrome
Photoreversible plant pigment that is involved in photoperiodism and other responses of plants, such as etiolation.
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