The device or structure where plants are grown in a controlled environment:

Related Mcqs:

1. When cane plants grown in the forest, they scamble over other vegetation and this corresponds to:

   A. Commensalism
   B. Competition
   C. Exploitation
   D. None of these

2. In a fish aquarium green aquatic plants are grown primarily for:

   A. Oxygen
   B. Carbon dioxide
   C. Fish feed
   D. Decoration

3. In an aquatic environment, microscopic animals and plants are collectively known:

   A. Commensals
   B. Herbivores
   C. Fauna and flora
   D. Planktons

4. Those chemicals which are produced by plants and affect other plants are broadly called:

   A. Depresants
   B. Allomones
   C. Allelochemics
   D. Kairomones

5. Among the plants listed, point out one that does not fit into ecological group represented by the other plants:

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

6. 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

7. Common combinations of the agroforestry system in Pakistan are: Trees species: Agricultural crops grown with trees:

   A. Poplars: wheat / maize / turmeric / sugarcane / vegetables / fodder
   B. Eucalypts: wheat/sunflower/tomatoes/potatoes/chilies
   C. Simal: maize/sunflower/vegetables/fodder
   D. Shisham: turmeric/wheat/maize/vegetables
   E. All of the above

8. Commonly grown flowering shrubs and trees are:

   A. Delonix regia, Bojer
   B. Millettia ovalifolia, Kurz
   C. Erytherina glabrescens, Parker
   D. Cassia fistula, Linn
   E. All of the above

9. If the same crop is repeatedly grown in a field:

   A. Nitrogen starvation many result
   B. Specific mineral deficiency may arise
   C. Soil will become prone to diseases
   D. Water level in soil will recede

10. 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