Science Vocab

Front 1

Parenchyma

Back 1

Spherical cells with thin, flexible walls
make food and storage

Front 2

Collenchyma

Back 2

Long cells with unevenly thickened walls
Provide for support

Front 3

Scelerenchyma

Back 3

Very thick, rigid cells

Front 4

Fibers

Back 4

Long strands

Front 5

Stone Cells

Back 5

Circular clusters

Front 6

Dermal Tissue*

Back 6

Flattened parenchyma that covers entire plant (skin)

Front 7

Stomata*

Back 7

Opening in leaf cuticle

Front 8

Guard Cells

Back 8

Control opening and closing of somata

Front 9

Trichomes

Back 9

Hair like projections to help reduce evaporation

Front 10

Vascular Tissue*

Back 10

Transport system in plant

Front 11

Xylem*

Back 11

Tubular cells that transport H2O from roots up

Front 12

Tracheids

Back 12

Tapered tubes

Front 13

Vessel Elements

Back 13

Wide and short with openings at both ends

Front 14

Phloem*

Back 14

Living tube cells that transport sugar from leaves down

Front 15

Sieve tube members

Back 15

Have no ribosomes or nucleus

Front 16

Companion Cells

Back 16

Nucleated cells that control sieve tube members

Front 17

Grand Tissues*

Back 17

All other tissues
photosynthesis, storage, support

Front 18

Meristematic Tissues*

Back 18

Regions of actively dividing cells (baby cells)

Front 19

Apical Meristem

Back 19

Tips of roots/stems

Front 20

Vascular Cambium

Back 20

Produces xylem/phloem

Front 21

Cork Cambium

Back 21

Produces tough outer coating for stems and roots

Front 22

Roots*

Back 22

Undergroud parts of a plant

Front 23

Root Hair

Back 23

Projection of single epidermis cell that increases surface area in contact with soil

Front 24

Cortex

Back 24

Ground tissue involved in transport of the H2O into the vascular system

Front 25

Endodermis

Back 25

Single layer of cells in center of cortex that forms H2O proof seal and controls H2O flow

Front 26

Pericycle

Back 26

Inside endodermis and forms shoots of older roots

Front 27

Root Cap

Back 27

Tough protective layer of parenchyma cells

Front 28

Stems*

Back 28

Above ground part that supports leaves and flowers

Front 29

Herbaceous Stems

Back 29

Green soft and flexible, and carryout photosynthesis

Front 30

Woody Stems

Back 30

Hard and rigid and contains xylem

Front 31

Sink

Back 31

Portion of plant that stores sugar

Front 32

Translocation*

Back 32

Movement of sugars from leaves through phloem

Front 33

Leaves*

Back 33

Main purpose=photosynthesis, flat with large surface area to capture more sunlight

Front 34

Petiole

Back 34

Stalk of leaf

Front 35

Compound Leaves

Back 35

Single blade divided into leaflets

Front 36

Whorled Leaves

Back 36

Three or more leaves on the same part of a stem

Front 37

Mesophyll*

Back 37

Photosynthetic tissue in a leaf

Front 38

Transpiration*

Back 38

Loss of H2O through stomata

Front 39

Venation Pattern

Back 39

Pattern of vascular tissue in leaves used to distinguish different groups of plants

Front 40

Hormone

Back 40

Chemical produced in one part of an orgamism and transported to another part that causes physiological changes

Front 41

Auxins

Back 41

Promote cell elongation

Front 42

Gibbrellins

Back 42

Promote cell elongation and growth

Front 43

Cyrtokinins

Back 43

Stimulate cell division by increasing protein production for mitosis

Front 44

Ethelyene

Back 44

Carbon and hydrogen gas that speeds ripening of fruit

Front 45

Tropism*

Back 45

Plant's respone to gravity

Front 46

Gravitropism

Back 46

Plant's response to gravity

Front 47

Thigmotropism

Back 47

Response to touch

Front 48

Nastic Movement

Back 48

Response not dependent on direction of stimulus