The waxy, waterproof layer that covers the leaves and stems of most plants.
The internal transporting tissue in some plants that is made up of tubelike structures.
A fertilized egg.
A low-growing plant that lacks true vascular tissue.
A plant that has true vascular tissue.
The stage in the life cycle of a plant in which the plant produces spores.
The stage in the life cycle of a plant in which the plant produces gametes, or sex cells.
A thin, rootlike structure that anchors a moss and absorbs water and nutrients for the plant.
The leaf of a fern plant.
The vascular tissue through which food moves in some plants.
The vascular tissue through which water and nutrients move in some plants.
Tiny particles (male gametophytes) produced by seed plants that contain the cells that later become sperm cells.
The plant structure that contains a young plant inside a protective covering.
The young organism that develops from a zygote.
A seed leaf; sometimes stores food.
The sprouting of the embryo out of a seed; occurs when the embryo resumes its growth.
A structure that covers the tip of a root, protecting the root from injury.
A layer of cells in a plant that produces new phloem and xylem cells.
The process by which water is lost through a plant's leaves.
A plant that produces seeds that are not enclosed by a protective fruit.
The reproductive structure of a gymnosperm.
A plant structure in seed plants that produces the female gametophyte; contains an egg cell.
The transfer of pollen from male reproductive structures to female reproductive structures in plants.
A flowering plant that produces seeds enclosed in a protective structure.
The reproductive structure of an angiosperm.
A leaflike structure that encloses the bud of a flower.
A colorful, leaflike structure of some flowers.
The male reproductive part of a flower.
The female reproductive part of a flower.
A flower structure that encloses and protects ovules and seeds as they develop.
The ripened ovary and other structures of an angiosperm that enclose one or more seeds.
An angiosperm that has only one seed leaf.
An angiosperm that has two seed leaves.
The growth response of a plant toward or away from a stimulus.
A chemical that affects growth and development.
A plant hormone that speeds up the rate of growth of plant cells.
A plant's response to seasonal changes in length of night and day.
A plant that flowers when the nights are longer than the plant's critical night length.
A plant that flowers when the nights are shorter than the plant's critical night length.
critical night length
The number of hours of darkness that determines whether or not a plant will flower.
A plant with a flowering cycle that is not sensitive to periods of light and dark.
A period when an organism's growth or activity stops.
A flowering plant that completes its life cycle in one growing season.
A flowering plant that completes its life cycle in two years.
A flowering plant that lives for more than two years.