Desert plants are generally:

Related Mcqs:

1. The biggest desert belt running from the Atlantic to _______ , including Sahara and some other samaller deserts such s the Arabian Desert (Arrub-al-Khali):

   A. China
   B. India
   C. Australia
   D. Iran

2. Plants growing on desert and steppe are called:

   A. Oxylophytes
   B. Lithophytes
   C. Eremophytes
   D. Psilophytes

3. The desert range areas are generally ploughed with a disc, followed by a cultivator, the general characteristics of an ideal seedbed are:

   A. Very firm below seeding depth
   B. Well pulverized and mellow on top
   C. Not cloddy or puddled
   D. Free from plant competition
   E. All of the above

4. Plants growing near the sea whore are generally resistant to:

   A. Lodging
   B. Erosion
   C. Salt spray
   D. Injuries

5. The mangrove plants are generally characterised by:

   A. Mircophylly
   B. Pneumatophores and vivipary
   C. Absence of aerenchyma
   D. Poor water storage

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

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

7. 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

8. 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

9. Which of the following is generally used for induced mutagenesis in crop plants?

   A. Gamma rays (from cobalt 60)
   B. X-rays
   C. UV (260 nm)
   D. Alpha particles

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