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Objective 13.02 • What are the biological terms (and their definitions) used to describe plants? Life Cycles of Plants • Annual-a plant that completes its life cycle in one year • Biennial-a plant that completes its life cycle in two years • Perennial-a plant that lives more than two years Leaf Retention • Deciduous-loses leaves during the dormant season • Evergreen-keeps leaves and remains green year-round Plant Hormones • Several types of hormones are used to help plants work more efficiently. – Inhibitors – cytokinins – gibberellias – auxins Inhibitors • Inhibitors hasten fruit ripening, retain seed germination and stem elongation. Cytokinins • Hormones that work with auxins to stimulate cell division. Gibberellias • Hormones that stimulate cell elongation, premature flowering, and breaking of dormancy. Auxins • Hormones that speed plant growth by stimulating cell enlargement Moisture in Plants • Turgid-plant is swollen or filled with moisture • Wilted-plant is limp because it does not have enough moisture • What are the biological terms (and their definitions) used to describe plants?
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