Biology Chapter 22-24 Vocab

alternation of generations

life cycle that has two alternationg phses (haploid and diploid phase)

angiosperm

any group of seed plants that bear their seeds within a layer of tissue that protects the seed (flowering plant)

antheridia

male reporductive structue in plants; produces sperm

archegnia

structure in plants that produces egg cells

auxin

hormone that helps the growth of roots

blade

leaf

bryophyte

group of plants that have specialized reproductive organs but lack vascular tissue

cotyledon

first leaf or leaves produced by the embryo

cuticle

waxy layer that covers the leaves and stems of a plant

dicot

angiosperm with 2 leaves in its ovary

ethylene

hormone that helps ripen fruits

fibrous roots

when roots grow to such an extent that no root grows larger than the rest

gametophyte

gamete producing plant; multicellular haploid pase of a plants life cycle

geotropism

tropic movement to gravity

guard cells

cell that controls the stomata

gymnosperm

group of seed plants that place their seeds directly on the scales

hormone

chemical produced in one part of an organism that affects another part of the same organism

monocot

angiosperm with one seed leaf in the ovary

nastic movement

very fast plant movement (venus fly trap)

non-vascular

plant without a vascular system consisting of xylem and phloem

petal

colored part of a flower

phloem

carries sugar from the leaves to the rest of the plant

phototropism

tropic movement towards light

pistil (carpel)

female reproductive part of a flower

sporophyte

spore-producing plant; the multicellular diploid phase of

a plant life cycle

stamen

pollen producing part of a flower (male)

stoma (stomata)

opening in the epidemis of a plant that allows organic compounds to diffuse in and out of the leaf

taproot

primary root; longest and biggest root in a plant

thigmotropism

response of a plant to touch

tropism

movement of a plant awya from stimuli

vascular (tissue)

specialized tissue in plants that carries water and nutrients

xylem

carries water from roots to leaves