Biology Plant Vocab.

Front 1

a microscopic pore surrounded by guard cells in the epidermis of leaves and stems that allows gas exchange

Back 1

stomata

Front 2

a hard material embedded in the cellulose matrix of vascular plant cell walls that function as an important adaptation for support in terrestrial species

Back 2

lignin

Front 3

a waxy covering on the surface of stems that acts as an adaption to prevent desiccation

Back 3

cuticle

Front 4

multicellular haploid form in organisms

Back 4

gametopohyte

Front 5

multicellular diploid form in organisms

Back 5

sporophyte

Front 6

a vascular plant that bears naked seeds

Back 6

gymnosperm

Front 7

a flowering plant which forms seeds in a protective chamber

Back 7

angiosperm

Front 8

tube shaped nonliving portion of the vascular system in plants that carries water and minerals

Back 8

xylem

Front 9

living cells arranged in tubes to transport sugar and other organic nutrients

Back 9

phloem

Front 10

referring to pants in which a single type of spore develops into a bisexual gametophyte having both male and female sex organs

Back 10

homosporous

Front 11

referring to plants in which the sporophyte produces two kinds of spores that develop into unisexual gametophytes either female or male

Back 11

heterosporous

Front 12

One of the two types of haploid spores produced by a heterosporous plant. Develop into female gametophytes and are usually larger than microspores.

Back 12

megaspore

Front 13

he smaller of the two kinds of spores characteristically produced by seed plants and some fern allies, developing into a male gametophyte

Back 13

microspore

Front 14

water conducting and supportive element of xylem composed of long thin cells

Back 14

tracheids

Front 15

specialized short wide cell in angiosperms arranged end to end

Back 15

vessel element

Front 16

chain of living cells that form sieve tubes in phloem

Back 16

sieve tubes

Front 17

the one or two seed leaves of an angiosperm embryo

Back 17

cotyledons

Front 18

plant tissue that remains embryonic as long as the plant lives allowing for unlimited growth

Back 18

meristem

Front 19

specialized epidermal plant cell that forms the boundaries of stomata

Back 19

guard cell

Front 20

growth initiated by the apical meristems of a plant root or shoot

Back 20

primary growth

Front 21

the increase in girth of the stems and roots of many plants

Back 21

secondary growth

Front 22

primary meristem of roots and shoots that form the vascular tissue

Back 22

procambium

Front 23

physical property that predicts the direction in which water will flow by solute concentrations and pressure

Back 23

water potential

Front 24

force directed against a cell wall after the influx of water and swelling of walled cell wall due to osmosis

Back 24

turgor pressure

Front 25

movement of water due to a difference in pressure between two locations

Back 25

bulk flow

Front 26

binding together of like molecules often by hydrogen bonds

Back 26

cohesion

Front 27

the property of sticking together (as of glue and wood) or the joining of surfaces of different composition; "the mutual adhesiveness of cells"; "a heated hydraulic press was required for adhesion"

Back 27

adhesion

Front 28

water impermeable ring of wax around epodermal cells in plants that blocks flow of water and solutes by cell walls

Back 28

Casparian strip

Front 29

growth of a plant shoot toward or away from light

Back 29

phototropism

Front 30

growth of a plant shoot toward or away from gravity

Back 30

gravitoprism

Front 31

a physiological response to day length, such as flowering in plants

Back 31

photoperiodism

Front 32

a class of plant hormones that have a variety of effects on the plant host

Back 32

auxins

Front 33

plant hormones that retard aging and act with auxins to stimulate cell division

Back 33

cytokinins

Front 34

plant hormones that stimulate growth in stems and leaves

Back 34

gibberellin

Front 35

plant hormone that acts to inhibit growth and help it through stressful conditions

Back 35

abscisic acid

Front 36

only gaseous plant plant hormone responsible for fruit ripening

Back 36

ethylene

Front 37

an inclusion, as a starch grain, that by a change in position within the cells of an organ or part is assumed to cause a corresponding change in position of the organ or part.

Back 37

statolith

Front 38

a physiological cycle of 24 hours, present in all eukaryotic organisms

Back 38

circadian rhythm

Front 39

cells that make up stomata

Back 39

guard cell