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mcqs of
,
1 : Root hairs absorb salts from soil by:
1
:
Diffusion
2
:
Osmosis
3
:
Active transport
4
:
Filtration
2 : Which element is required by plants for the formation of chlorophyll?
1
:
Phosphorus
2
:
Calcium
3
:
Magnesium
4
:
Sulfur
3 : The transpiration is regulated by:
1
:
Mesophyll
2
:
Guard cells
3
:
Xylem
4
:
Phloem
4 : Which of the following plant nutrients is required in large amount?
1
:
Iron
2
:
Zinc
3
:
Potassium
4
:
Boron
5 : The primary function of root hair is:
1
:
Transport of nutrients
2
:
Storage of food
3
:
Increase surface area for absorption
4
:
Synthesis of proteins
6 : What is TRUE according to the pressure flow mechanism of food transport?
1
:
Water enters the source, creating pressure
2
:
Water is pulled from the sink
3
:
Movement of food in phloem is due to gravity
4
:
Solutes move from low to high concentration
7 : Which ion plays a role in the opening of stomata?
1
:
Sodium (Na+)
2
:
Potassium (K+)
3
:
Calcium (Ca²⁺)
4
:
Magnesium (Mg²⁺)
8 : In most plants, the food is transported in the form of:
1
:
Glucose
2
:
Sucrose
3
:
Starch
4
:
Maltose
9 : Under which condition will there be a high rate of transpiration?
1
:
High humidity
2
:
Low light intensity
3
:
Windy
4
:
Waterlogged
10 : Succulent organs are present in:
1
:
Xerophytes
2
:
Hydrophytes
3
:
Neophytes
4
:
Halophytes
11 : Water moves from the soil into root cells by:
1
:
Osmosis
2
:
Active transport
3
:
Diffusion
4
:
Bulk flow
Chapter 9 : Plant Physiology
Biology 9th MCQs || Ilam Ghar
Biology 9th
