ICSE Class 8 Biology by Pavan | Practice Test to Test Your Knowledge
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ICSE Class 8 Biology

ICSE Class 8 Biology

Detailed mock test on Plant and Animal Life, Food and Nutrition, and Health. Features diagram-based questions and life science applications.

2025-07-19
Pavan Pavan
ICSE Biology Grade 8 Class 8

Duration

30 min

Questions

30

Marking

Negative

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Questions Preview

What is diffusion?

A
The movement of particles from a region of lower concentration to a region of higher concentration.
B
The movement of particles from a region of higher concentration to a region of lower concentration.
C
The movement of water across a semi-permeable membrane.
D
The movement of nutrients through the plant.

Which of the following is an example of diffusion in plants?

A
Water entering the plant roots
B
Food being transported through phloem
C
Oxygen and carbon dioxide exchange in leaves
D
Root pressure formation

What is osmosis?

A
The movement of water from a region of higher concentration to a region of lower concentration across a semi-permeable membrane.
B
The movement of nutrients through the plant's vascular system.
C
The movement of gases in and out of the plant.
D
The absorption of water by the roots.

What is an example of osmosis in plants?

A
Absorption of water by roots
B
Exchange of gases in the stomata
C
Food being transported through phloem
D
Root pressure formation

What is a semipermeable membrane?

A
A membrane that allows all substances to pass through.
B
A membrane that allows only some substances to pass through.
C
A membrane that allows water and nutrients to pass freely.
D
A membrane that does not allow any substance to pass through.

What is root pressure?

A
The pressure exerted by the roots to push water up through the plant.
B
The force that causes water to move into the roots from the soil.
C
The pressure exerted by the plant's leaves to pull water from the soil.
D
The force exerted by the plant to release excess water.

What is active transport in plants?

A
The movement of water from a high concentration to a low concentration.
B
The movement of ions from a low concentration to a high concentration using energy.
C
The movement of nutrients from the roots to the leaves by diffusion.
D
The movement of water through osmosis.

Which of the following is an example of active transport in plants?

A
Absorption of water from the soil
B
Movement of glucose through phloem
C
Movement of mineral ions into root cells
D
Gaseous exchange in leaves

What is transpiration?

A
The process of water movement through the plant and its evaporation from aerial parts.
B
The process of water absorption by roots.
C
The movement of food through the plant.
D
The conversion of carbon dioxide into oxygen in leaves.

Why is transpiration important for plants?

A
It helps in the cooling of the plant and maintains the flow of water through the plant.
B
It helps the plant to take in nutrients from the soil.
C
It provides energy for the plant.
D
It helps the plant to form new cells.

Which of the following factors does NOT affect transpiration?

A
Temperature
B
Humidity
C
Soil type
D
Wind speed

How does temperature affect transpiration?

A
Higher temperature increases the rate of transpiration.
B
Higher temperature decreases the rate of transpiration.
C
Temperature does not affect transpiration.
D
Higher temperature stops transpiration.

What is the structure responsible for the transport of water in plants?

A
Phloem
B
Xylem
C
Stomata
D
Chloroplast

Which of the following is true about phloem?

A
Phloem transports water from roots to leaves.
B
Phloem transports food from leaves to other parts of the plant.
C
Phloem is responsible for the formation of root pressure.
D
Phloem only transports oxygen.

What is the main function of xylem?

A
Transporting food
B
Transporting water and minerals
C
Transporting gases
D
Photosynthesis

Which part of the plant carries out the process of transpiration?

A
Leaves
B
Roots
C
Stem
D
Flowers

What is the function of root pressure in plants?

A
It helps in the upward movement of water.
B
It helps in the downward movement of water.
C
It aids in the movement of food through phloem.
D
It helps in the formation of glucose.

Which of the following is a macro-nutrient for plants?

A
Nitrogen
B
Iron
C
Copper
D
Zinc

Which of the following is a micro-nutrient for plants?

A
Magnesium
B
Iron
C
Calcium
D
Phosphorus

What deficiency causes chlorosis (yellowing of leaves) in plants?

A
Nitrogen deficiency
B
Magnesium deficiency
C
Iron deficiency
D
Potassium deficiency

Which deficiency leads to stunted growth in plants?

A
Phosphorus deficiency
B
Potassium deficiency
C
Nitrogen deficiency
D
Iron deficiency

Which of the following deficiencies causes reduced flowering in plants?

A
Potassium deficiency
B
Nitrogen deficiency
C
Magnesium deficiency
D
Phosphorus deficiency

Which of the following nutrients is important for the formation of chlorophyll?

A
Magnesium
B
Calcium
C
Nitrogen
D
Iron

Which of the following is a symptom of nitrogen deficiency?

A
Yellowing of leaves
B
Stunted growth
C
Reduced root growth
D
Poor flowering

Which of the following is NOT a macro-nutrient?

A
Sulfur
B
Iron
C
Magnesium
D
Potassium

Which of the following is an effect of potassium deficiency in plants?

A
Weak stems and poor root development
B
Poor fruit development
C
Stunted growth
D
Leaf curling

Which nutrient is essential for the synthesis of proteins in plants?

A
Phosphorus
B
Nitrogen
C
Magnesium
D
Calcium

Which of the following nutrients is important for the formation of strong cell walls?

A
Magnesium
B
Calcium
C
Potassium
D
Iron

Which nutrient is essential for photosynthesis?

A
Iron
B
Magnesium
C
Phosphorus
D
Zinc

What deficiency causes reduced photosynthesis in plants?

A
Magnesium deficiency
B
Iron deficiency
C
Phosphorus deficiency
D
Calcium deficiency