Transpiration

Question 1

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

Answer 1

2

Question 2

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

Answer 2

Transpiration

Question 3

Transpiration

Answer 3

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

Question 4

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

Answer 4

Outside temp is cool enough ``

Question 5

____ paper is an indicator of moisture

Answer 5

Cobalt Chloride (CoCl2)

Question 6

When dry, cobalt chloride is ___ in colour

Answer 6

Blue

Question 7

When exposed to moisture, blue cobalt chloride paper turns ____

Answer 7

pink

Question 8

Ganong’s potometer measures

Answer 8

Rate of water intake by a plant

Question 9

Rate of water intake is almost equal to

Answer 9

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

Question 10

Farmer’s potometer use

Answer 10

Rate of water intake by plant

Question 11

Garreau’s potometer use

Answer 11

demonstrates unequal transpiration from two sides of dorsiventral leaf

Question 12

Darwin’s potometer use

Answer 12

demonstrate suction force created due to transpiration

Question 13

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

Answer 13

Releasing water from reservoir

Question 14

Twig should be cut obliquely to

Answer 14

Allow large surface of water intake

Question 15

Twig should be cut underwater to

Answer 15

Avoid suction of air bubble into twig

Question 16

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

Answer 16

Outside air

Question 17

Three types of transpiration

Answer 17

Stomatal
Cuticular
Lenticular

Question 18

transpiration occurring directly from the surface of leaves and stems

Answer 18

Cuticular transpiration

Question 19

Stomata are minute opening in the ________ layer of leaves

Answer 19

Epidermal

Question 20

stomata is surrounded by two ______ cells

Answer 20

Guard cells

Question 21

Guard cells are ___-shaped

Answer 21

Bean

Question 22

Stomata’s primary function

Answer 22

Intake of CO2 for photosynthesis

Question 23

no. of stoma per cm2

Answer 23

1000- 10000 per cm2

Question 24

pathway of stomatal transpiration

Answer 24

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

Question 25

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

Answer 25

thin film

Question 26

thin film evaporates and saturates air in ___ _____

Answer 26

intercellular spaces

Question 27

where does water turn into water vapour during stomatal transpiration? 1. sub stomatal space 2. inter cellular space 3. stomata 4. atmosphere

Answer 27

2. inter cellular space

Question 28

stomatal transpiration is basically an example of

Answer 28

Diffusion

Question 29

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

Answer 29

Cell wall , imbibition

Question 30

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

Answer 30

50

Question 31

dorsiventral leaf is also known as

Answer 31

Dicot leaf

Question 32

more transpiration occurs in the _____ surface of a leaf

Answer 32

under

Question 33

why more transpiration occurs from lower surface of leaf

Answer 33

due to presence of more stomata

Question 34

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

Answer 34

bcoz rate of transpiration > rate of absorption

Question 35

Which type of transpiration is naturally controlled? how?

Answer 35

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

Question 36

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

Answer 36

waxy, epidermis

Question 37

primary function of cuticle

Answer 37

prevent evaporation of water from leaf

Question 38

Cuticle is ____ to water

Answer 38

Impervious

Question 39

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

Answer 39

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

Question 40

greater the thickness of cuticle, ____ is the transpiration

Answer 40

Lesser

Question 41

Desert plants tend to have __ cuticle

Answer 41

Thick

Question 42

Lenticels develop on

Answer 42

Barks of older stems

Question 43

____ never close and remain open always

Answer 43

Lenticels

Question 44

How does lenticular transpiration occur>

Answer 44

Water from cell surfaces facing lenticels evaporates

Question 45

amount of transpiration is least in which method

Answer 45

Cuticular

Question 46

The six external factors affecting transpiration

Answer 46

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

Question 47

more transpiration occurs during (day/night)

Answer 47

Day

Question 48

Increase in intensity of sunlight - _____ in transpiration

Answer 48

Increase

Question 49

Increase in outside temperature - ____ in transpiration

Answer 49

increase

Question 50

warm airs can hold ____ water than cold air

Answer 50

more

Question 51

Increase in wind velocity - ____ in transpiration

Answer 51

increase

Question 52

why wind velocity affects transpiration

Answer 52

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

Question 53

Increase in humidity - _____ in transpiration

Answer 53

decrease

Question 54

normal CO2 level in atmosphere

Answer 54

0.03 %

Question 55

increase in CO2 level - _____ in transpiration

Answer 55

Decrease

Question 56

Why CO2 affects transpiration?

Answer 56

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

Question 57

Increase in atmospheric pressure -______ in transpiration

Answer 57

Decrease

Question 58

internal factor affecting transpiration

Answer 58

Water content of ;eaves

Question 59

adaptations in plants to reduce excessive transpiration

Answer 59

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

Question 60

example of plant with sunken stomata

Answer 60

Nerium

Question 61

Example of plant with narrow leaves to reduce transpiration

Answer 61

Nerium

Question 62

Example of tree with thick cuticle

Answer 62

Banyan and most evergreen trees

Question 63

Change of leaves into spines can be seen in

Answer 63

Cactii

Question 64

3 significances of transpiration

Answer 64

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

Question 65

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

Answer 65

Transpiration

Question 66

loss of water directly in liquid form

Answer 66

exudation

Question 67

exudation occurs in two ways

Answer 67

Guttation | Bleeding

Question 68

Guttation usually occurs in ____, ____ conditions

Answer 68

Warm, humid

Question 69

Guttation occurs through ___

Answer 69

Hydathodes

Question 70

Guttation can be seen in

Answer 70

Banana, nasturtium, strawberry, tomato, grass, ferns

Question 71

Cause for guttation

Answer 71

High root pressure

Question 72

Guttation mostly occurs at (day/night)

Answer 72

Night

Question 73

Exudate of bleeding

Answer 73

Plant sap and sugars

Question 74

Exudate of guttation

Answer 74

Water with dissolved salts

Question 75

fluid given out by exudation

Answer 75

Exudate

Question 76

Hydathodes are present on the

Answer 76

margins of the leaf

Question 77

Experiment to demonstrate transpiration

Answer 77

Bell Jar experiment

Question 78

example of anti transpirants

Answer 78

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