Question Paper
Class / Subject: Class 10 (ICSE) · Biology
Chapter: Chapter 4 — Chapter 4: Absorption by Roots - Mechanism
Time Allowed: 32 minutes
Max Marks: 16
1. What increases surface area for root absorption? [1]
(A) Root hairs
(B) Leaves
(C) Flowers
(D) Stems
2. How does water enter root cells? [1]
(A) By osmosis
(B) By evaporation only
(C) By combustion
(D) By no specific process
3. What tissue transports water upward after absorption? [1]
(A) Xylem
(B) Phloem
(C) Cortex only
(D) Epidermis only
4. What process absorbs minerals against a concentration gradient? [1]
(A) Active transport
(B) Osmosis only
(C) Diffusion only
(D) No process needed
5. What does active transport require? [1]
(A) Energy (ATP)
(B) No energy at all
(C) Only water
(D) Only sunlight
6. What pathway does water follow after entering root hairs? [1]
(A) Root hair → cortex → xylem
(B) Root hair → xylem directly
(C) Root hair → phloem directly
(D) No specific pathway
7. Why is root absorption important? [1]
(A) It supplies nutrients and water for growth
(B) It has no importance
(C) Only for decoration
(D) Only for flowering
8. Why study root absorption mechanisms? [1]
(A) To understand plant nutrition and growth
(B) No reason
(C) It's not useful
(D) Only for tests
9. What increases surface area for root absorption? [1]
(A) Root hairs
(B) Leaves
(C) Flowers
(D) Stems
10. How does water enter root cells? [1]
(A) By osmosis
(B) By evaporation only
(C) By combustion
(D) By no specific process
11. What tissue transports water upward after absorption? [1]
(A) Xylem
(B) Phloem
(C) Cortex only
(D) Epidermis only
12. What process absorbs minerals against a concentration gradient? [1]
(A) Active transport
(B) Osmosis only
(C) Diffusion only
(D) No process needed
13. What does active transport require? [1]
(A) Energy (ATP)
(B) No energy at all
(C) Only water
(D) Only sunlight
14. What pathway does water follow after entering root hairs? [1]
(A) Root hair → cortex → xylem
(B) Root hair → xylem directly
(C) Root hair → phloem directly
(D) No specific pathway
15. Why is root absorption important? [1]
(A) It supplies nutrients and water for growth
(B) It has no importance
(C) Only for decoration
(D) Only for flowering
16. Why study root absorption mechanisms? [1]
(A) To understand plant nutrition and growth
(B) No reason
(C) It's not useful
(D) Only for tests