vascular
specialized tissue in plants that carries water and nutrients
Phloem
Living vascular tissue that carries sugar and organic substances throughout a plant
Xylem
Nonliving vascular tissue that carries water and dissolved minerals from the roots of a plant to its leaves
vascular bundle
a unit strand of the vascular system in stems and leaves of higher plants consisting essentially of xylem and phloem
stoma
opening that regulates gas exchange and water evaporation between leaves and the environment, typically situated on the underside of leaves
Cuticle
A waxy covering on the surface of stems and leaves that acts as an adaptation to prevent desiccation in terrestrial plants.
pollen
A fine dust that contains the sperm of seed-producing plants
Monocotyledon
A subdivision of flowering plants whose members possess one embryonic seed leaf of cotyledon
Dicotyledon
A subdivision of flowering plants whose members possess an embryonic seed leaf made of two halves or cotyledons
Stamen
the male reproductive organ of a flower
filament
the stalk of a stamen
Anther
the part of a stamen that contains the pollen.
fruit
A mature ovary of a flower that protects dormant seeds and aids in their dispersal.
vegetable
A plant part that is used as food, but that is not classified botanically as a fruit.
Cellulose
A substance (made of sugars) that is common in the cell walls of many organisms
cotyledon
first leaf or first pair of leaves produced by the embryo of a seed plant
seed
The plant structure that contains a young plant inside a protective covering
Pollination
transfer of pollen from anther to stigma
Pistil
The female reproductive part of a flower
Stigma
The part of the pistil where pollen germinates.
Style
An enlongated part of a carpel, or group of fused carpels, between the ovary and the stigma
root
An organ in vascular plants that anchors the plant and enables it to absorb water and minerals from the soil.
stem
supporting structure that connects roots and leaves and carries water and nutrients between them
leaf
the main organ of photosynthesis and transpiration in higher plants
Transpiration
Evaporation of water from the leaves of a plant
Auxins
Plant hormones that lead to phototropism by elongating the dark side of the plant
Gibberellins
Plant hormone that promotes stem elongation
Hormones
Chemical messengers, mostly those manufactured by the endocrine glands, that are produced in one tissue and affect another
ethylene gas
Hormone which helps ripen fruits
palisade mesophyll
layer of cells under the upper epidermis of a leaf
spongy mesophyll
layer of loose tissue found beneath the palisade mesophyll in a leaf
guard cell
Pairs of cells that surround stomata and control their opening and closing.
Tropism
A growth response of a plant toward or away from a stimulus
Phototropism
A plant's response to light
Thigmotropism
A growth response to touch
Geo/gravitropism
response to earth's gravity
shoot system
consists of stems and leaves
root system
all the roots of a plant
dermal
"skin" of plant. Covers plants entire body; serves to protect.
turgor pressure
The pressure that water molecules exert against the cell wall
nitrogen cycle
The transfer of nitrogen from the atmosphere to the soil, to living organisms, and back to the atmosphere
carbon cycle
The organic circulation of carbon from the atmosphere into organisms and back again
Ovary
A flower structure that encloses and protects ovules and seeds as they develop.
Petals
modified leaves which are usually bright in color to attract pollinators.