← Glencoe Science Ch.11 Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All stomata is for raw materials such as carbon dioxide, water vapor and waste gases to enter and exit the leaf chlororophyll that are green pigments that make chloroplasts green photosynthesis a process during which plants chlorophyll traps light energy and sugars are produced respiration a series of chemical reactions that look down food molecules and release energy tropism a response of a plant to external stimuli movement caused by change in growth auxin type of plant hormone that causes the plant stems and leaves to exhibit positive response to light photoperiodism plant's response to the number of hours of daylight and darkness it receives long-day plants plant that generally requires short-nights-less than 12 hours of darkness-to begin the flowering process short-day plants plants that generally require long-nights-12 or more hours of darkness-to begin flowering process day-netural plants plant that does not require a specific photoperiodism and can begin the flowering process over a range of night lengths