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| a green pigment found in the chloroplasts of plants, algae, and some bacteria. |
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| a plant using carbon dioxide gas and water to make food and oxygen |
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| groups of similar cells that perform specific functions in an organism |
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| structures in a plant cell that make food |
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| a large storage sac that can expand and shrink. |
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| a waxy, waterproof layer that helps a plant reduce water loss |
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| a system of tube-like structures inside a plant through which water, minerals, and food move. |
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| plants that lack vascular tissue for transporting materials |
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| thin, root-like structures that anchor moss and absorb water and nutrients |
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| plants with true vascular tissue |
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| the vascular tissue through which food moves |
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| the vascular tissue through which water and minerals move |
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| tiny structures that contain the cells that will later become the sperm cells |
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| a structure that contains a young plant inside a protective covering |
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| a seed plant that produces naked seeds |
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| flowering plants that produce seeds enclosed in fruit |
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| angiosperms that have only one seed leaf |
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| angiosperms that have two seed leaves |
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| protects the root from injury as the root grows through the soil |
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| tissue that produces new xylem and phloem |
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| small openings in a leaf that open and close to allow gas to enter or escape the leaf |
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| the process by which water evaporates from a plant's leaves |
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| the young plant the develops from the fertilized egg |
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| occurs when the embryo begins to grow and pushes out of the seed |
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| the reproductive structure of an angiosperm |
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| the transfer of pollen from male reproductive structures to female reproductive structures |
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| leaf-like structures that protect a flower while still in bud |
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| generally the most colorful parts of a flower |
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| male reproductive parts of the flower |
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| female reproductive parts of the flower |
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| protects the seeds as they develop |
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| a stage in a plants life cycle in which the plant produces spores |
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| a stage in a plants life cycle in which the plant produces two kinds of sex cells: sperm cells and egg cells |
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| flowering plants that complete a life cycle within one growing season |
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| flowering plants that complete their life cycles within two growing seasons |
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| flowing plants that live for more that two years |
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| occurs when a sperm cell unites with an egg cell |
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| the reproductive structures of gymnosperms |
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| a structure that contains an egg cell |
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| the ripened ovary and other structures that enclose one or more seeds |
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| a plant's growth response toward or away from a stimulus |
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| a chemical that affects how an organism grows and develops |
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| a plant hormone that speeds up the rate at which a plant's cells grow and controls a plant's response to light |
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| a plant's response to seasonal changes in the length of day and night |
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| the number of hours of darkness that determines whether or not a plant will flower |
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| plants that flower when the nights are longer than a critical length (bloom in fall or winter) |
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| plants that flower when the nights are shorter than a critical length (bloom in spring or summer) |
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| plants that have a flowering cycle that is not sensitive to periods of light and dark (bloom year-round depending on weather) |
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| a period when an organisms growth or activity stops |
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| mosses in a bog that become compressed into layers and form a blackish brown material |
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