Year 11 Module 2: Organisation of Living Things Quiz

What is the primary function of xylem tissue in plants?

• Transport of water and minerals

• Transport of sugars

• Gas exchange

• Photosynthesis

Answer explanation

The primary function of xylem tissue in plants is the transport of water and minerals from the roots to other parts of the plant, making it essential for plant hydration and nutrient distribution.

Which structure in plants is responsible for gas exchange?

• Phloem

• Xylem

• Root hairs

• Stomata

Answer explanation

Stomata are small openings on the surface of leaves that allow for gas exchange, enabling plants to take in carbon dioxide and release oxygen during photosynthesis. Phloem and xylem are involved in nutrient and water transport, not gas exchange.

What is the main role of the alveoli in the human respiratory system?

• Digestion of food

• Production of enzymes

• Gas exchange

• Transport of blood

Answer explanation

The main role of the alveoli in the human respiratory system is gas exchange. They facilitate the transfer of oxygen into the blood and the removal of carbon dioxide, which is essential for respiration.

Which of the following is NOT a characteristic of multicellular organisms?

• Hierarchical organization

• Specialized cells

• Cells work together to perform tasks

• Cells can survive independently

Answer explanation

Multicellular organisms rely on specialized cells that work together, making them interdependent. The statement 'Cells can survive independently' is incorrect, as individual cells in multicellular organisms cannot function alone.

What is the function of the root cap in plants?

• Transport of sugars

• Photosynthesis

• Protection of the growing tip

• Gas exchange

Answer explanation

The root cap protects the growing tip of the root as it pushes through the soil. It acts as a shield against physical damage and helps the root navigate through the soil, making 'Protection of the growing tip' the correct choice.

Which hypothesis explains the formation of multicellular organisms from unicellular organisms?

• Endosymbiotic Hypothesis

• Cell Theory

• Colonial Flagellate Hypothesis

• Gene Expression Hypothesis

Answer explanation

The Colonial Flagellate Hypothesis suggests that multicellular organisms evolved from a colony of unicellular flagellates, where cells remained together and specialized, leading to the formation of complex multicellular structures.

What is the main function of the phloem tissue in plants?

• Photosynthesis

• Gas exchange

• Transport of sugars

• Transport of water

Answer explanation

The main function of phloem tissue in plants is the transport of sugars produced during photosynthesis from the leaves to other parts of the plant, making 'Transport of sugars' the correct answer.

Which part of the digestive system is primarily responsible for nutrient absorption?

• Small intestine

• Large intestine

• Stomach

• Mouth

Answer explanation

The small intestine is primarily responsible for nutrient absorption, as it has specialized structures like villi and microvilli that increase surface area for efficient absorption of nutrients from digested food.

What is the role of guard cells in plant leaves?

• Photosynthesis

• Control of stomata opening and closing

• Nutrient absorption

• Transport of water

Answer explanation

Guard cells regulate the opening and closing of stomata, which are crucial for gas exchange and transpiration in plants. This function is essential for maintaining homeostasis and optimizing photosynthesis.

Which type of circulatory system do insects have?

• Closed circulatory system

• Single circulatory system

• Open circulatory system

• Double circulatory system

Answer explanation

Insects have an open circulatory system, where hemolymph (a fluid equivalent to blood) bathes the organs directly, rather than being confined to vessels. This system is efficient for their body structure and metabolic needs.