1st Year Biology Chapter 8 TestPlant Physiology

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. What causes spring wood to appear lighter?

   1. Absence of xylem

   2. Thicker cell walls

   3. Wider vessels and high cambial activity

   4. Less water absorption

2. What happens to Ψs when more solute is added?

   1. It increases

   2. It becomes more negative

   3. It becomes zero

   4. It becomes positive

3. What is the symplast pathway?

   1. Movement through cell walls

   2. Movement through xylem only

   3. Movement through interconnected protoplasts via plasmodesmata

   4. Movement in the phloem

4. Which nutrient forms the core of the chlorophyll molecule?

   1. Iron

   2. Zinc

   3. Magnesium

   4. Sulfur

5. Which of the following is a micronutrient?

   1. Oxygen

   2. Potassium

   3. Boron

   4. Carbon

6. The inner bark of a plant is mainly composed of:

   1. Xylem

   2. Phloem

   3. Parenchyma

   4. Cork

7. What drives the TACT mechanism in plants?

   1. Root pressure

   2. Osmosis

   3. Transpiration

   4. Capillary action only

8. How do insectivorous plants benefit from prey?

   1. They extract water from them

   2. They obtain nitrogenous compounds

   3. They collect minerals

   4. They store sunlight

9. Which process refers to the intake and utilization of nutrients?

   1. Photosynthesis

   2. Digestion

   3. Respiration

   4. Nutrition

10. Which hormone breaks bud dormancy?

    1. Gibberellins

    2. Ethylene

    3. Abscisic acid

    4. Auxin