mod 4 lec

Question 1

what are the 4 functions of roots

Answer 1

absorbs
stores
anchors
produce hormones

Question 2

elongation in response to stimuli

Answer 2

auxins

Question 3

seed germination

Answer 3

gibberellins

Question 4

cell division
growth of fruits

Answer 4

cytokinin

Question 5

maturation and aging

Answer 5

ethylene

Question 6

death of leaves

Answer 6

abscisic acid

Question 7

root growth of dicots and gymnosperms

Answer 7

taproot system

Question 8

root growths of monocot and seedless vascular plants

Answer 8

fibrous root system

Question 9

composed of thimble-shaped mass of parenchyma cells covering the tip of each root.
protects delicate tissues behind from damage as the young root tip pushes through the soil particles

Answer 9

root cap

Question 10

what does the root cap contain

Answer 10

amyloplast
dictiosomes

Question 11

acts as gravity sensors and orients the root to grow downward

Answer 11

amyloplast

Question 12

this region is composed of apical meristem and produce the root cap

Answer 12

region of cell division

Question 13

what are the three subdivision of apical meristem

Answer 13

protoderm
ground meristem
procambium

Question 14

this region merges with apical meristem, cells become longer and wider

Answer 14

region of cell elongation

Question 15

this region is also known as differentiation or root hair zone..
cells mature or differentiate to form into the dermal, vascular and ground tissues

Answer 15

region of maturation

Question 16

tubular extensions of specialized epidermal cells that absorbs water and minerals and adheres tightly into soil particles for anchorage

Answer 16

root hairs

Question 17

parenchyma cells resting between the epidermis and the inner tissues that acts as the food storage

Answer 17

cortex

Question 18

single-layered cylinder of compactly arranged cells whose primary walls are impregnated by suberin

Answer 18

endodermis

Question 19

suberin band which prevents water from passing through the permeable cell walls of the endodermis

Answer 19

casparian strip

Question 20

thin-walled endodermal cells which serves as the passageway of materials between the cortex and the vascular bundle

Answer 20

passage cells

Question 21

a collective core of tissues that lies inside the endodermis which may conduct water or food in solution

Answer 21

vascular cylinder

Question 22

region where lateral roots arise in which their cells continue to divide even after maturtion

Answer 22

pericycle

Question 23

four functions of stems

Answer 23

transport
store
supports
produce new living tissues

Question 24

grows stems that bear leaves and flowers located at the tip of the stem

Answer 24

terminal bud

Question 25

protects dormant terminal buds

Answer 25

bud scales

Question 26

left after bud scales fall off

Answer 26

bud scars

Question 27

also known as lateral buds. grows stems that bear leaves and flowers found in the axils

Answer 27

axillary bud

Question 28

shows where the leaf WAS attached to the stem

Answer 28

leaf scars

Question 29

area of the stem where the leaves are attached

Answer 29

node

Question 30

area on the stem between two successive nodes

Answer 30

internode

Question 31

site of loosely arranged cells that allows gas exchange

Answer 31

lenticel

Question 32

outer covering that provides protection by producing cuticle

Answer 32

epidermis

Question 33

central cylinder of the stem which is composed of vascular bundle

Answer 33

stele

Question 34

vascular cells arranged in a circular pattern

Answer 34

vascular bundle

Question 35

ground tissue composed of large, thin-walled parenchyma cells that functions primarily for storage

Answer 35

pith

Question 36

main growth tissue of stems and roots

Answer 36

vascular cambium

Question 37

functioning secondary xylem

Answer 37

sapwood

Question 38

non-functioning secondary xylem which provide structural support

Answer 38

heartwood

Question 39

continuous cylinder or dividing cells that makes up the periderm

Answer 39

cork cambium

Question 40

are dead at maturity and have heavily suberized or waterproof walls

Answer 40

cork cells

Question 41

stores water and food

Answer 41

cork parenchyma

Question 42

functions of leaves

Answer 42

identity produce food

Question 43

a part of the leaves that is broad, flat portion of the leaf

Answer 43

lamina/blade

Question 44

a part of the leaves where the stalk is attaches the leaf to the stem

Answer 44

PETIOLE

Question 45

a part of the leaves where there is a leaf-like outgrowth at the base of the petiole

Answer 45

stipule

Question 46

a part of the leaves where there is no stipule

Answer 46

sessile

Question 47

a type of leaf with only a single plate

Answer 47

simple

Question 48

a type of leaf with two or more divided leaflets

Answer 48

compound

Question 49

leaflets are borne on an axis that is a continuation of the petiole

Answer 49

pinnately

Question 50

leaflets arise from common point at the end of the petiole

Answer 50

palmately

Question 51

one leaf at each node

Answer 51

alternate

Question 52

two leaves at each node

Answer 52

opposite

Question 53

three or more leaves at each node

Answer 53

whorled

Question 54

primary veins run approximately parallel to one another along the leaf's long axis with smaller veins forming connections between the primary veins

Answer 54

parallel

Question 55

smaller veins branch off the larger veins that resembles a net

Answer 55

reticulated / netted