ch 35 and 36 Flashcards Preview

Bio 121 spring 2014 > ch 35 and 36 > Flashcards

Flashcards in ch 35 and 36 Deck (22):
1

root hairs

increase surface area

2

nodes

pts where leaves are attached

3

internodes

the stem segment between nodes

4

axillary bud

a structure that has potential to form a lateral shoot or branch

5

apical bud

causes elongation of a young shoot

6

apical dominance

helps maintain dormancy in most axillary buds

7

xylem

water and dissolved minerals

8

phloem

transports organic nutrients to where they are needed

9

water conducting cells of xylem

tracheids and vessel elements

10

tracheids

found in all vascular plants

11

sieve tube elements

alive and functional at maturity, lack organelles

phloem

12

sieve plates

porous end walls that allow fluid to flow between cells along the seive tube

13

companion cell

each seive tube element has one, whose nucleus and ribosomes serve both cells

14

meristems

perpetually ebryonic tissue and allows for indertiminate growth

15

apical meristems

located at the tips of roots and shoots and at the axillary buds of shoots

16

primary growth

apical meristems elongate shoots and roots

17

secondary growth

lateral meristems add thickness to woody plants

18

2 lateral meristems

vascular cambium and cork cambium

19

vascular cambium

adds layers of vascular tissue called secondary xylem and secondary phloem

20

cork cambium

replaces the epidermis with periderm, which is thicker and tougher

21

stomata

allows CO2 and O2 exchange
guard cells

22

mesophyll

ground tissue in leaf