Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BI 226 > Leaves > Flashcards

Leaves Flashcards

1
Q

Petiole

- none?

A
  • Attaches leaf blade to the stem

- Sessile

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Leaf arrangement:

  • Basal leaves?
  • Alternate leaves?
A
  • All leaves at the base of the stem forms rosette

- One at a node

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Leaf arrangement:

  • Opposite?
  • Whorled?
A
  • Pairs, members are positioned on opposite sides

- 3 or more leaves at a node

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Phyllotaxy

A
  • Arrangement of leaves and stems
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Dichotomous venation

A
  • Secondary and tertiary veins branch repeatedly in two veins (bifurcate) (ginko/waterlily)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Pinnate venation

A

a single primary vein with the secondary veins arising along its length like the hairs of a feather

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Palmate venation

A

with several major veins radiating from the base of the leaf blade.
(maple leaf)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Parallel venation

A

Parallel veins from base of the blade (spider plant) - monocots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  • Lobes are

- never have

A
  • Large incisions

- petioles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Leaf margins:

A
  • Serrate
  • Denate
  • Crenate
  • Sinate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Pinnately compound

A

Leaves arranged off of a single stem with one on each side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Palmately compound

A

multiple leaves from a single node

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Leaf duration:

  • Most leaves
  • Decidious
  • Evergreen
A
  • 1 or 2 growing seasons
  • Fall at the end of growing season
  • Persistent leaves
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Leaf shapes:

  • Ovate
  • Obovate
  • Elliptic
  • Oblong
A
  • Widest near base
  • Widest near apex
  • Widest near middle
  • Hexagonal
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Lotus effect

A

Leaf epidermis is hydrophobic or superhydrophobic

  • Water repellant
  • Self cleaning
  • Papillae w/ a dense coating of wax
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Monocot vs. dicot stomata arrangement

A
  • Paralell and unordered
17
Q

Leaves consist of:

A

an upper epidermis, a lower epidermis, and in between them, the mesophyll

18
Q

The mesophyll is

A

parenchymatic and is the site of photosynthesis.

19
Q

The palisade parenchyma

A

has narrow cells, densely packed together (with few intercellular spaces), which contain 80% of the leaf chloroplasts.

20
Q

The spongy parenchyma is made of

A

irregularly shaped cells with numerous intercellular spaces, which contain less chloroplasts.

21
Q

Large veins are accompanied

A

by collenchyma or fibers.

22
Q

The veins have different sizes and consist of

A

collateral vascular bundles (xylem towards the upper epidermis and phloem towards the lower epidermis)

23
Q

Undifferentiated mesophyll (many monocots)

A

it is a uniform chlorenchyma/spongy parenchyma

24
Q

Kranz Anatomy

Inner ringle called? Contains

A

C4 photosynthesis
Vascular bundles surrounded by 2 rings
the inner ring, called bundle sheath cells (Bs), contain chloroplasts lacking grana
Chloroplasts = dimorphic (outer ring differs from inner)

25
Q

Xeromorphic leaf adaptations

- Conifers

A

Arid areas
Thick cuticles, leaves look thick and leathery
- pine leaves, have layer of scherenchyma under the epidermis

26
Q

Bulliform cells

A

Store water in many grasses

Loss of water in vacuoles makes leaf blades roll up

27
Q

Water hyacinth

A

Swollen petioles w/ air channels - flotation device

28
Q

Salvnia

A

Hairs create a layer of air on the surface of leaves - flotation device

29
Q

Aquatic pants

A

Floating leaves - no stomata

30
Q
  • Tendrils
  • Spines
  • Thisles case
A
  • Pea Plant
  • Cactus (Areoles w/ spines)
  • Margins of leaves w/ spines
31
Q

Flower pot leaves

A

Symbiotic relationship b/w ants and the plant

32
Q

Window leaves

- Translucent area?

A
  • Fenestration
  • Translucent area that focuses sunlight into the mesophyll where photosynthesis takes place
  • The translucent part may consist of the epidermis or several cell layers of parenchyma
  • Usually below ground
33
Q

Bracts

A
  • Floral leaves
  • Poinsettia
  • Hot lips
34
Q

Carnivorous leaves

- Sun dews

A
  • grow in soils with poor mineral availability and they use insects to supplement their nutrition
  • Sticky secretion on leads to capture and digest insects
35
Q

Mosquito fern, azolla

A
  • Fix nitrogen from the air
  • Azolla - most important fern in the world, nitrogen fertilizer factory
  • Fertilizer

BI 226 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions