Lecture 22- Vascular Plants Flashcards

1
Q

what are the two types of vascular plants?

A

seed
seedless

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2
Q

what are the 3 things that living vascular plants are characterized by?

A

dominant sporophyte
vascular tissues (xylem and phloem)
well developed roots and leaves

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3
Q

what are the 3 tissue types in roots stems and leaves of vascular plants?

A

vascular tissue
ground tissue
dermal tissue

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4
Q

what does the vascular tissue system do? (2)

A

transports materials long-distances between roots and shoots
provides mechanical support

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5
Q

what does the vascular tissue consist of? (2)

A

xylem
phloem

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6
Q

what does xylem do?

A

conducts water and minerals up from roots to shoots

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7
Q

what does xylem consist of?

A

dead (no nucleus) tracheids (tube shaped cells)

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8
Q

what does the phloem do?

A

transports organic products to where their needed

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9
Q

what does the phloem consist of?

A

living cells (nucleus) that are arranged into tubes

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10
Q

in the stele (stem) and leaves how is the vascular tissue distributed?

A

into bundles (in the root the vascular tissue is all together)

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11
Q

what is the ground tissue internal to the vascular tissue called?

A

pith

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12
Q

what is the ground tissue external to vascular tissue called?

A

cortex/ cortical ground tissue

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13
Q

what does ground tissue do? (4)

A

cells specialized storage
photosynthesis
support
transport

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14
Q

what are the 3 cell types of ground tissue/ differentiated plant cells?

A

parenchyma
collenchyma
sclerenchyma

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15
Q

what do parenchyma cells look like?

A

thin and flexible primary cells
isodiametric (diameter is the same around the cell)

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16
Q

what can parenchyma cells do easily?

A

metabolic functions (because the cell wall is thin)

17
Q

what do collenchyma cells look like?

A

thick and uneven cell walls
have lots of cytoplasm

18
Q

what do collenchyma cells do?

A

support young parts of the plant shoot
provide flexible support without restraining growth

19
Q

are collenchyma cells alive or dead?

A

alive (have a nucleus)

20
Q

what do sclerenchyma cells look like?

A

thick cell walls
no nucleus

21
Q

what are the two types of sclerenchyma cells?

A

sclereids
fibers

22
Q

what are the 3 key features that a mature fern sporophyte has?

A

rhizome
leaves
roots

23
Q

what is the rhizome?

A

underground stem produced by SAM

24
Q

what does the shoot apical meristem produce?

A

all structures above ground
primary growth up and down
axial growth

25
what tissues are apart of the SAM?
ground vascular dermal
26
in non-woody plants the dermal tissue system consists of an epidermis, what does it do?
waxy coating that prevents water loss
27
the epidermis gets replaced when old, what does it get replaced with?
periderm
28
what is another factor of the dermal tissue that prevents water loss?
trichomes, they prevent the plant from drying out
29
what are two types of leaves? how do they differ?
microphyll (has one single vein) megaphyll (has highly branched vascular system. large SA)
30
what are the 3 types of roots?
adventitious lateral primary
31
what are adventitious roots?
roots that grow from any nonroot tissue
32
what does the root apical meristem produce?
all below ground structures. every root has a RAM primary growth axial growth
33
what tissues are apart of the RAM?
ground vascular dermal
34
what does the RAM have that the SAM does not?
cytoplasm
35
what is the third meristem? (hint, its not apical)
lateral meristem
36
what does the lateral meristem do?
secondary growth (adds thickness to woody plants)
37
what are the two lateral meristems?
vascular cambium cork cambium
38
what does the vascular cambium do?
adds layers of vascular tissue (secondary xylem and phloem)
39
what does the cork cambium do? (3)
replaces the epidermis with periderm allows the plant to be thicker and tougher produces bark