9th class Biology, Chapter 5: Tissues, Organs, and Organ Systems MCQs

1. At which level of organization gas exchange occurs between body and environment?

1. (A) Organelle level in mitochondria
2. (B) Cellular level in alveolar cells
3. (C) Tissue level in epithelial tissues
4. (D) Organ system level in the respiratory system ✓

2. The epithelial tissue in the stomach wall is responsible for producing:

1. (A) Mucus
2. (B) Pepsinogen
3. (C) Hydrochloric acid
4. (D) All of these ✓

3. In the wall of stomach, which tissue also contains blood vessels and nerves?

1. (A) Epithelial
2. (B) Muscle
3. (C) Inner connective ✓
4. (D) Outer connective

4. In a leaf, which tissue is responsible for photosynthesis?

1. (A) Xylem
2. (B) Mesophyll ✓
3. (C) Epidermis
4. (D) Phloem

5. What is the primary function of the xylem tissue in a leaf?

1. (A) To transport sugars to other parts
2. (B) To transport water to parts of leaf ✓
3. (C) To synthesize chlorophyll
4. (D) To control the opening and closing of stomata

6. The smallest unit of matter that maintains the property of an element is the:

1. (A) atom ✓
2. (B) molecule
3. (C) organelle
4. (D) cell

7. Which of the following is a molecule?

1. (A) Water ✓
2. (B) Carbon atom
3. (C) Mitochondrion
4. (D) Neuron

8. The smallest unit with the characteristics of life is the:

1. (A) cell ✓
2. (B) atom
3. (C) organelle
4. (D) tissue

9. A group of similar cells that work together to perform specific functions is called a:

1. (A) tissue ✓
2. (B) organ
3. (C) organelle
4. (D) organism

10. Which tissue covers body surfaces and lines cavities in animals?

1. (A) Epithelial tissue ✓
2. (B) Muscle tissue
3. (C) Vascular tissue
4. (D) Epidermal tissue

11. Which tissue of plants transports water and nutrients?

1. (A) Vascular tissue ✓
2. (B) Epidermal tissue
3. (C) Epithelial tissue
4. (D) Muscle tissue

12. The heart and lungs are examples of:

1. (A) organs ✓
2. (B) tissues
3. (C) organelles
4. (D) organ systems

13. Which of the following is an organ system of plants?

1. (A) Shoot system ✓
2. (B) Circulatory system
3. (C) Digestive system
4. (D) Epithelial system

14. A living entity that can function independently through its organ systems is called an:

1. (A) organism ✓
2. (B) organ
3. (C) organelle
4. (D) tissue

15. The upper epidermis of a leaf is usually covered by a waxy:

1. (A) cuticle ✓
2. (B) stoma
3. (C) xylem
4. (D) cell wall

16. The tiny pore between two guard cells is called a:

1. (A) stoma ✓
2. (B) cuticle
3. (C) midrib
4. (D) vein

17. Stomata control:

1. (A) gas exchange and loss of water vapour ✓
2. (B) transport of sugars
3. (C) absorption of minerals
4. (D) formation of chlorophyll

18. The mesophyll tissue is located:

1. (A) between the upper and lower epidermis ✓
2. (B) on the outside of the leaf
3. (C) only in the root
4. (D) only in the midrib

19. The palisade mesophyll consists of:

1. (A) tightly packed elongated cells ✓
2. (B) loosely arranged cells with air spaces
3. (C) dead cells
4. (D) guard cells

20. The air spaces in the spongy mesophyll help in the:

1. (A) diffusion of gases ✓
2. (B) storage of starch
3. (C) absorption of water
4. (D) formation of cuticle