Chapter 22 Vocabulary

Question 1

tropism

Answer 1

a plant’s growth response to an external stimulus

Question 2

nastic responces

Answer 2

a plant’s responce that causes movement that is not dependent on the direction of the stimulus

Question 3

cytokinins

Answer 3

rapidly dividing cells

Question 4

ethylene

Answer 4

The only gaseous plant hormone, responsible for fruit ripening, growth inhibition, leaf abscission, and aging.

Question 5

gibberellins

Answer 5

group of plant hormones that are transported in vascular tissue and that can affect seed growth, stimulate cell division, and cause cell elongation

Question 6

auxin

Answer 6

one of the first plant hormones to be identified

Question 7

transportation

Answer 7

water evaporates from the inside of a leaf to the outsides though stomata

Question 8

spongy mesophyll

Answer 8

consisting of irregularly-shaped, loosely packed cells with spaces surrounding them

Question 9

palisade mesophyll

Answer 9

contains many chloroplast and makes up the tissue

Question 10

petiole

Answer 10

depending on the plant species, the blade might be attached to the stem by a stalk

Question 11

pericycle

Answer 11

The layer of cells directly next to the endodermis toward the center of the root

Question 12

endodermis

Answer 12

Inner boundary of the cortex is a layer of cells

Question 13

cortex

Answer 13

the layer below the epidermal layer

Question 14

root cap

Answer 14

the tip of the primary root that has several layers of cells which protects the root as it grows through the soil

Question 15

ground tissue

Answer 15

consists of paraenchyma, collenchyma, and sclerechyma

Question 16

companion cells

Answer 16

the active cells found next to sieve tube elements that supply the phloem vessels with all of their metabolic needs

Question 17

sieve tube member

Answer 17

contains cytoplasm but lacks a nucleus and ribosomes when it is mature

Question 18

pholem

Answer 18

main food carrying tissue

Question 19

tracheid

Answer 19

long, cylindrical plant cell in which water passes from cell to cell through pitted ends

Question 20

vessel elements

Answer 20

tubular cells that are stacked end-to-end, forming strands of xylem called vessels

Question 21

xylem

Answer 21

water carrying vascular tissue

Question 22

guard cell

Answer 22

the two cells that form a stoma

Question 23

epidermis

Answer 23

outer covering on a plant is dermal tissue

Question 24

cork cambion

Answer 24

produces cells that develop tough cell walls

Question 25

vascular cambium

Answer 25

thin cylinder of meristematic tissue

Question 26

meristems

Answer 26

regions of rapidly dividing cells

Question 27

Sclerechyma Cells

Answer 27

plant cells that lacks cytomplasm

Question 28

collencyma cell

Answer 28

elongated cells with unevenly thick walls that form a supportive tissue of plants

Question 29

parenchyma cell

Answer 29

most flexible, thin-walled cells found throughout the plant