The percentage of light energy utilized for photosynthesis by higher plants is:

Related Mcqs:

1. The percentage of light from total solar input utilized by plants:

   A. About 1%
   B. 3 – 5%
   C. 7 – 8%
   D. 14%

2. The maximum amount of CO2 fixed by green plants by way of photosynthesis in a year is:

   A. 9 x 1013 kg
   B. 8 x 1012 kg
   C. 9 x 1011 kg
   D. 8 x 1010 kg

3. The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem’s:

   A. Net primary productivity
   B. Gross secondary productivity
   C. Net secondary productivity
   D. Gross primary productivity

4. According to Odum, the percentage of net primary production of total light intake is:

   A. 10%
   B. 0.15%
   C. 1%
   D. 1.50%

5. The non-green plants are as important as the green plants because they:

   A. Cause human disease
   B. Cause diseases of other plants
   C. Are useful in several industries
   D. Bring about decomposition of dead animals and plant remains

6. Plants adapted to low light intensity have:

   A. Higher rate of CO2 fixation than the sun plants
   B. More extended root system
   C. Leaves modified to spines
   D. Larger photosynthetic unit size than the sun plants

7. The zone of soil showing microbial activity around the roots of higher plants is called:

   A. Rhizosphere
   B. Rhizoplane
   C. Soil microflora
   D. All of these

8. A symbiotic association between fungus and roots of higher plants is known as:

   A. Lichen
   B. Mycorrhiza
   C. Mutualism
   D. None of these

9. According to Geiger, the percentage of light reflected by the clouds is:

   A. 9%
   B. 10%
   C. 48%
   D. 39%

10. Among the plants listed, point out one that does not fit into biological group represented by other plants

    A. Euphorbia
    B. Acacia
    C. Vallisneria
    D. Aloe