Multiple Choice Questions 10×1=10
1
In most plants the food is transported in the form of:
A
Glucose
B
Sucrose
C
Starch
D
Maltose
2
Succulent organs are present in:
A
Xerophytes
B
Hydrophytes
C
Mesophytes
D
Halophytes
3
Which of the following is not a macronutrient for plants?
A
Nitrogen
B
Iron
C
Potassium
D
Calcium
4
Which nutrient is essential for the synthesis of nucleic acid?
A
Magnesium
B
Nitrogen
C
Potassium
D
Calcium
5
What type of transport does not require energy?
A
Active transport
B
Osmosis
C
Endocytosis
D
None of these
6
Which factors increases the rate of transpiration?
Root → Stem → Leaves → Atmosphere
A
High humidity
B
Low temperature
C
Wind
D
None of these
7
What happens to glucose concentration in guard cells at night?
Hint: Guard cells regulate stomatal opening and closing
A
Increases
B
Decreases
C
Remains the same
D
Converts into starch
8
Which process in leaves creates the pulling force for water movement?
A
Photosynthesis
B
Transpiration
C
Respiration
D
Guttation
9
Which of the following helps water molecules sticks to the wall of xylem vessels?
A
Root pressure
B
Adhesion
C
Gravity
D
Photosynthesis
10
What connects water movement in roots, stems and leaves?
A
Transpiration pull
B
Guttation
C
Photosynthesis
D
Root pressure
Short Answer Questions 15×2=30
1
Define macronutrients and micronutrients and give examples.
ii
Why do plants transpire more on a windy day compared to a humid one?
iii
Differentiate between: Hydrophytes and Halophytes
iv
Differentiate between: Hydrophytes and xerophytes
vi
What is the role of epidermis in a plant root?
vii
What are vascular tissues?
viii
Differentiate between lenticels and stomatal transpiration?
ix
What is the primary tissue responsible for food translocation in plants?
x
What is pressure flow mechanism?
xi
In daytime and night, what mechanisms occur?
Hint: Consider stomatal opening/closing and photosynthesis/respiration
xii
Why do plants need to remove excess water?
xiii
What is the main habitat of mesophytes?
xiv
How do halophytes prevent water loss in salty environment?
xv
Why do mesophytes keep their stomata closed during heat and dry periods?