Brainscape's Knowledge GenomeTM

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


See full index

Biology > Transpiration > Flashcards

Transpiration Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

____% of water is used by the plant in photosynthesis and other activities

A

2

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

most of water absorbed by roots is lost as a result of _____

A

Transpiration

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

Transpiration

A

Process of loss of water in the form of WATER VAPOUR from LEAVES and other AERIAL parts of the plant

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

in an experiment involving a polythene bag tied around a plant, water vapour given out condenses only if

A

Outside temp is cool enough ``

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

____ paper is an indicator of moisture

A

Cobalt Chloride (CoCl2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When dry, cobalt chloride is ___ in colour

A

Blue

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

When exposed to moisture, blue cobalt chloride paper turns ____

A

pink

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

Ganong’s potometer measures

A

Rate of water intake by a plant

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

Rate of water intake is almost equal to

A

water lost via transpiration ( only 2% is used for other activities)

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

Farmer’s potometer use

A

Rate of water intake by plant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Garreau’s potometer use

A

demonstrates unequal transpiration from two sides of dorsiventral leaf

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

Darwin’s potometer use

A

demonstrate suction force created due to transpiration

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

Air bubble in Ganong’s potometer can be brought back to original position by

A

Releasing water from reservoir

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Twig should be cut obliquely to

A

Allow large surface of water intake

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Twig should be cut underwater to

A

Avoid suction of air bubble into twig

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

changes in __________ temp may affect position of air bubble in capillary tube

A

Outside air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Three types of transpiration

A

Stomatal
Cuticular
Lenticular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

transpiration occurring directly from the surface of leaves and stems

A

Cuticular transpiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Stomata are minute opening in the ________ layer of leaves

A

Epidermal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

stomata is surrounded by two ______ cells

A

Guard cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Guard cells are ___-shaped

A

Bean

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Stomata’s primary function

A

Intake of CO2 for photosynthesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

no. of stoma per cm2

A

1000- 10000 per cm2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

pathway of stomatal transpiration

A

stem-> veins -> tissues of leaf -> spongy mesophyll cells –> intercellular spaces –> sub stomatal space–> escape through stoma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

surface of spongy mesophyll cells give out water as a __ ___

A

thin film

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

thin film evaporates and saturates air in ___ _____

A

intercellular spaces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

where does water turn into water vapour during stomatal transpiration?

  1. sub stomatal space
  2. inter cellular space
  3. stomata
  4. atmosphere
A
  1. inter cellular space
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

stomatal transpiration is basically an example of

A

Diffusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

most of this water ( the water which is given out as thin fim by spongy mesophyll) travels along the ______ by _______`

A

Cell wall , imbibition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Transpiration pull created can draw up water to ____m or more in tall trees

A

50

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

dorsiventral leaf is also known as

A

Dicot leaf

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

more transpiration occurs in the _____ surface of a leaf

A

under

33
Q

why more transpiration occurs from lower surface of leaf

A

due to presence of more stomata

34
Q

Leaves of some plant wilt during midday even if there is plenty of water in the soil… Why is this?

A

bcoz rate of transpiration > rate of absorption

35
Q

Which type of transpiration is naturally controlled? how?

A

Stomatal transpiration
IN case water content of leaf is falling, guard cells lose their turgidity thereby closing the stoma and preventing transpiration
once the water content is restored, guard cells become turgid , stoma opens

36
Q

Cuticle is a _____ layer secreted on both sides of the leaf by ______

A

waxy, epidermis

37
Q

primary function of cuticle

A

prevent evaporation of water from leaf

38
Q

Cuticle is ____ to water

A

Impervious

39
Q

if primary function is to prevent evaporation, how does cuticular transpiration take place

A

The cuticle imbibe some water from epidermis … which is transpired into the atmosphere

40
Q

greater the thickness of cuticle, ____ is the transpiration

A

Lesser

41
Q

Desert plants tend to have __ cuticle

A

Thick

42
Q

Lenticels develop on

A

Barks of older stems

43
Q

____ never close and remain open always

A

Lenticels

44
Q

How does lenticular transpiration occur>

A

Water from cell surfaces facing lenticels evaporates

45
Q

amount of transpiration is least in which method

A

Cuticular

46
Q

The six external factors affecting transpiration

A
  1. intensity of sunlight
  2. temperature
  3. wind velocity
  4. humidity
  5. Carbon- di - oxide
47
Q

more transpiration occurs during (day/night)

A

Day

48
Q

Increase in intensity of sunlight - _____ in transpiration

A

Increase

49
Q

Increase in outside temperature - ____ in transpiration

A

increase

50
Q

warm airs can hold ____ water than cold air

A

more

51
Q

Increase in wind velocity - ____ in transpiration

A

increase

52
Q

why wind velocity affects transpiration

A

if wind blows faster, water vapour released is removed faster so the area outside leaf does not get saturated with water vapour

53
Q

Increase in humidity - _____ in transpiration

A

decrease

54
Q

normal CO2 level in atmosphere

A

0.03 %

55
Q

increase in CO2 level - _____ in transpiration

A

Decrease

56
Q

Why CO2 affects transpiration?

A

increase in CO2 causes stomatal closure thus it reduces transpiration as well

57
Q

Increase in atmospheric pressure -______ in transpiration

A

Decrease

58
Q

internal factor affecting transpiration

A

Water content of ;eaves

59
Q

adaptations in plants to reduce excessive transpiration

A
  1. Sunken stomata
  2. Fewer stomata
  3. Narrow leaves
  4. Reduced exposed surfaces
  5. Loss of leaves or changed into spines
  6. Thick cuticle
60
Q

example of plant with sunken stomata

A

Nerium

61
Q

Example of plant with narrow leaves to reduce transpiration

A

Nerium

62
Q

Example of tree with thick cuticle

A

Banyan and most evergreen trees

63
Q

Change of leaves into spines can be seen in

A

Cactii

64
Q

3 significances of transpiration

A
  1. cooling effect
  2. Suction force
  3. Distribution of mineral salts and water
65
Q

Forest contribute in bringing rain.. how? one word answer

A

Transpiration

66
Q

loss of water directly in liquid form

A

exudation

67
Q

exudation occurs in two ways

A

Guttation

Bleeding

68
Q

Guttation usually occurs in ____, ____ conditions

A

Warm, humid

69
Q

Guttation occurs through ___

A

Hydathodes

70
Q

Guttation can be seen in

A

Banana, nasturtium, strawberry, tomato, grass, ferns

71
Q

Cause for guttation

A

High root pressure

72
Q

Guttation mostly occurs at (day/night)

A

Night

73
Q

Exudate of bleeding

A

Plant sap and sugars

74
Q

Exudate of guttation

A

Water with dissolved salts

75
Q

fluid given out by exudation

A

Exudate

76
Q

Hydathodes are present on the

A

margins of the leaf

77
Q

Experiment to demonstrate transpiration

A

Bell Jar experiment

78
Q

example of anti transpirants

A
  1. phenyl mercuric acetate
  2. aspirin
  3. absisic acid

Biology (5 decks)

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