1st Year Biology Chapter 9 Test09. Diversity in Plants Functions

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

1. Long-day plants require ______ to flower.
   1. Short nights
   2. Long nights
   3. No light
   4. Continuous dark
2. The most accepted theory of translocation is ______.
   1. Diffusion theory
   2. Capillary theory
   3. Osmotic theory
   4. Pressure flow theory
3. Water potential of pure water is ______.
   1. Positive
   2. Zero
   3. Negative
   4. Variable
4. Vascular cambium produces ______.
   1. Secondary xylem and secondary phloem
   2. Cork and secondary cortex
   3. Root hairs
   4. Pith
5. Pressure potential increases when ______.
   1. Water leaves the cell
   2. Solute decreases
   3. Cell becomes flaccid
   4. Cell becomes turgid
6. The meristem responsible for increase in thickness of stems and roots is ______.
   1. Lateral meristem
   2. Apical meristem
   3. Intercalary meristem
   4. Primary meristem
7. Guard cells are the only cells of epidermis, which have:
   1. Vacuole
   2. Chloroplasts.
   3. Cytoplasm
   4. Leucoplasts
8. The main function of support in plants is to ______.
   1. Store food
   2. Absorb water
   3. Perform photosynthesis
   4. Keep the body erect and in shape
9. Meristematic cells have ______.
   1. Small vacuoles and thin walls
   2. Large vacuoles and thick walls
   3. Thick lignified walls
   4. No nucleus
10. Solute potential is always ______.
    1. Positive
    2. Zero
    3. Negative
    4. Neutral