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Bio 2 Lab Practical 1 > Leaves > Flashcards

Leaves Flashcards

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Biology 101 flashcards
0
Q

What is the origin of the secondary veins?

A

From the main vein

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1
Q

In a coleus leaf can you see other veins, such as secondary veins?

A

Yes

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2
Q

What is netted pinnate veination?

A

Main veins arranged in branching pattern and form a network

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3
Q

Name another plant besides coleus with netted pinnate veination?

A

Marigold

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4
Q

What is netted palmate veination?

A

Main veins arise from a single common point then branch to form a network

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5
Q

What is a node?

A

Site when leaf is attached to the stem

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6
Q

How are nodes related to leaf arrangement?

A

One node = alternate
Two nodes = opposite
3+ nodes = whorled

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7
Q

How does the upper leaf surface differ from the lower leaf surface of a magnolia?

A

Upper is waxy and lower is fuzzy

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8
Q

What is cutin?

A

Material that makes up the cuticle

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9
Q

What is a cuticle?

A

An external waxy layer that slows evaporation and shedding of water

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10
Q

Are petioles and ancillary buds present in corn?

A

No

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11
Q

Is the blade present in monocots?

A

Yes

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12
Q

What is a sheath?

A

Attaches the blade to the stem

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13
Q

What is the function of a sheath?

A

Protection
Act as a stem
Move carbs from leaves to stem

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14
Q

The sheathi n monocots is analogous to what structure in dicots?

A

Petiole

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15
Q

Describe the venation pattern of a monocot leaf?

A

Main veins are parallel to each other

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16
Q

Can monocots and dicots be distinguished based on venation?

A

Yes, dicots have netted venation and monocots have parallel venation

17
Q

Can you find guard cells in the epidermis?

A

Yes, but only in lower epidermis

18
Q

Is a cuticle presents on either epidermis

A

Yes

19
Q

What is the function of the cuticle?

A

Slow evaporation
Sheds water

Ashley said “reduce transpiration”

20
Q

Do guard cells contain chloroplasts?

A

Yes

21
Q

Is the wall the guard cell evenly thick throughout? Explain.

A

Yes, it borders where the nucleus and chloroplasts are held

22
Q

If turf or pressure increases in the guard cells, will the stomates be open or closed?

A

Stomates open

23
Q

What gases that are exchanged through the stomate?

A

Water vapor
Oxygen
Carbon dioxide

24
Q

Describe the shape of the epidermal cells

A

Stratified simple squamous epithelium

25
Q

Do the epidermal cells contain chloroplasts?

A

No

26
Q

Xerophyte leaves are adapted for what environmental conditions?

A

Dry conditions

27
Q

What modifications are present in xerophyte leaves that permit them to tolerate these environmental conditions?

A

Cuticle
Additional epidermis layers
Sunken stomates

28
Q

Hydrophyte leaves are adapted for what environmental conditions?

A

Wet conditions

29
Q

What modifications are present in hydrophyte leaves that permit them to tolerate these environmental conditions?

A

Thin epidermis

Large spaces

30
Q

What are the eight leaf modifications?

A 
Bract
Bud scales
Bulb
Spines
Stipule 
Succulent
Insect trap
Reproductive
31
Q

What is the function of a bract? Name an example

A

Reproduction

Poinsettia

32
Q

What is the function of bud scales? Name an example plant

A

Protection

terminal bud

33
Q

What is an example of an insect trap? Name an example plant

A

Feeding

Pitcher plant

34
Q

What is the function of spines? Name an example

A

Protection

Cactus

35
Q

What is the function of the stipule? Name an example?

A

Photosynthesis and protection

Rose

36
Q

What is the function of a bulb? Name an example

A

Storage

Onion

37
Q

What is the function of a succulent? Name an example

A

Storage

Aloe

38
Q

What is the function of a reproductive leaf?

A

Reproduction

39
Q

Which type of cell does palisade mesophyll consist of?

A

Parenchyma

40
Q

What type of cell does spongy mesophyll consist of?

A

Parenchyma

Bio 2 Lab Practical 1 (4 decks)

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