ch 35 and 36 Flashcards Preview

Bio 121 spring 2014 > ch 35 and 36 > Flashcards

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

root hairs

A

increase surface area

2
Q

nodes

A

pts where leaves are attached

3
Q

internodes

A

the stem segment between nodes

4
Q

axillary bud

A

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

5
Q

apical bud

A

causes elongation of a young shoot

6
Q

apical dominance

A

helps maintain dormancy in most axillary buds

7
Q

xylem

A

water and dissolved minerals

8
Q

phloem

A

transports organic nutrients to where they are needed

9
Q

water conducting cells of xylem

A

tracheids and vessel elements

10
Q

tracheids

A

found in all vascular plants

11
Q

sieve tube elements

A

alive and functional at maturity, lack organelles

phloem

12
Q

sieve plates

A

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

13
Q

companion cell

A

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

14
Q

meristems

A

perpetually ebryonic tissue and allows for indertiminate growth

15
Q

apical meristems

A

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

16
Q

primary growth

A

apical meristems elongate shoots and roots

17
Q

secondary growth

A

lateral meristems add thickness to woody plants

18
Q

2 lateral meristems

A

vascular cambium and cork cambium

19
Q

vascular cambium

A

adds layers of vascular tissue called secondary xylem and secondary phloem

20
Q

cork cambium

A

replaces the epidermis with periderm, which is thicker and tougher

21
Q

stomata

A

allows CO2 and O2 exchange

guard cells

22
Q

mesophyll

A

ground tissue in leaf