Examlex
Facial expressions are symbols of emotion, whereas physiological arousal levels are signs of emotion.
Red Light
A portion of the visible light spectrum with the longest wavelengths, often used in various signaling devices and therapeutic practices.
Far-Red Light
A range of light with wavelengths slightly longer than those of red light, often used in plant growth studies.
Long-Day Plant
A plant that flowers in response to shortening nights; also called short-night plant. Compare with short-day, intermediate-day, and day-neutral plants.
Critical Period
A specific time in an organism's development when it is particularly sensitive to certain environmental stimuli or experiences, which can have long-lasting effects on its future behavior and development.
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