Plant Parts
Three types of plant organs
Roots, stems and leaves
Provides support and structure in a plant and is made largely of cellulose
Cell wall
Growth in response to gravity
Gravitropism
Where most plants absorb the water & minerals they need
The epidermis of many leaves secretes a waxy substance that forms a protective covering called what?
Cuticle
The region where a leaf is or was attached to the stem
Node
The part of the seed that is stored food for the embryo
Cotyledon
Growth in response to touch
Thigmotropism
Stems that are capable of supporting a lot of weight
Woody stems
The outermost tissue of leaves, young roots and young stems
Epidermis
A root system that grows in clusters that are all about equal in size, i.e. grasses.
Fibrous root
Plant tissue that is made primarily of long, hollow cells, much like miniature straws, that carries water throughout the plant.
Xylem
Growth away from a factor
Negative tropism
The flat part of a leaf
Blade
The cells that control the opening and closing of the stomata to regulate water and gas leaving the plant
Guard cells
The tissues that carry water and sugar-containing solutions in the leaves
Veins
Plant tissue that carries a sugar solution to the growing regions of a plant
Phloem
A plant's growth response to light
Phototropism
The stem type that is more flexible
Herbaceous stem
The openings found on the underside of leaves where water and gases like O2 and CO2 leave the plant
Stomata
A root system with one main root that is thicker and longer than other roots
Taproot
Caused by the presence of water in a plant's cells that help support the plant
Turgor pressure
Plants that bloom when nights are long
Short-day plants
Aerobic respiration in plants converts usable sugar to what?
Energy
Tightly packed cells that make most of the plant's food
Palisade layer