Maddie's Plant Term for Chapter 5

37 terms by lvascience 

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Phloem

the vascular tissue through which food moves in some plants

xylem

the vascular tissue through which water and nutrients move in some plants

pollen

tiny particles (male gametophytes) produced by seed plants that contain the cells that later become sperm cells

seed

the plant structure that contains a young plant inside a protective covering

embryo

the young plant that develops from the zygote

cotyledon

a seed leaf that stores food

germination

the sprouting of the embryo from a seed that occurs where the embryo resumes growth

root cap

a structure that covers the tip of a root, protecting the root from injury

cambium

the layer of cells in a plant that produces new phloem and xylem cells

stomata

Small openings on the underside of a leaf through which oxygen and carbon dioxide can move.

transpiration

loss of water from a plant through its leaves

gymnosperm

seed plant that bears its seeds directly on the surfaces of cones

ovule

A structure that develops within the ovary of a seed plant and contains the female gametophyte.

cone

the reproductive structure of a gymnosperm

pollination

transfer of pollen from the male reproductive structure to the female reproductive structure

angiosperm

a flowering plant that produces seeds within a fruit

flower

the reproductive structure of an angiosperm

sepal

a leaflike structure that encloses the bud of a flower

petal

brightly colored structure just inside the sepals; attracts insects and other pollinators to a flower

stamen

the male reproductive organ of a flower

pistil

The female reproductive part of a flower

ovary

a flower structure that encloses and protects ovules and seeds as they develop

fruit

the ripened ovary and other structures of an angiosperm that enclose one or more seeds

monocot

an angiosperm that has only one seed leaf

dicot

an angiosperm that has two seed leaves

tropism

A growth response of a plant toward or away from a stimulus

hormone

a chemical that affects how the plant grows and develops

auxin

the plant hormone that speeds up the rate of growth of plant cells

photoperiodism

a plants response to seasonal changes in length of night and day

short-day plant

A plant that flowers when the nights are longer than the plant's critical night length.

long-day plant

A plant that flowers when the nights are shorter than 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

day-neutral plant

A plant with a flowering cycle that is not sensitive to periods of light and dark.

dormancy

a period when an organism's growth or activity stops

annual

flowering plant that completes a life cycle within one growing season

biennial

flowering plant that completes its life cycle in two years

perennial

a plant lasting for three seasons or more

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