9th Class Biology Chapter 9 TestPlant Physiology

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

1. Sucrose enters the sieve tubes of phloem by ......:

   1.  Passive transport 

   2. Osmosis 

   3. Diffusion 

   4. Active transport

2. The transpiration is regulated by:

   1. Mesophyll

   2. Guard cells

   3. Xylem

   4. Phloem

3. Pressure flow machanism is about:

   1. Translocation of food

   2. Transport of water

   3. Opening of stomata

   4. Tranpiration

4. From which process plants get their food:

   1. Respiration

   2. Photosynthesis

   3. Oxidation

   4. Gaseous Exchange

5. When Stomata remain open?

   1. When guard cells remains turgid

   2. When guard cell become soft

   3. When there is no water is guard cells

   4. None of these

6. What are not the function of leaves in plants?

   1. Photosynthesis

   2. Water storage

   3. Waste storage

   4. Gas exchange

7. Macronutrient essential for plant growth is:

   1. Boron

   2. Copper

   3. Nitrogen

   4. Manganese

8. Water moves from the soil into root cells by:

   1. Osmosis

   2. Active transport

   3. Diffusion 

   4. Bulk flow

9.  Which one factor is not affecting the rate of transpiration:

   1. Temperature 

   2. Wind

   3. Water  

   4. Humidity 

10. According to pressure-flow theory one of the following is not a sink:

    1. Root

    2. Leaves

    3. Stem tubers

    4. Fruits