When a plant of hot climate is transferred to colder regions, it gets an injury called:

Related Mcqs:

1. Prairies and steppes are parts of the natural regions called:

   A. Temperate grasslands
   B. Tropical grasslands
   C. Prairie grasslands
   D. Steppes grasslands

2. Plants grow sparsely in arid regions of the world:

   A. Only because of high temperature
   B. Because no seeds fall near the soil
   C. Because of several environmental factors combining together
   D. Because the soil is sandy

3. Many forested regions of today were once barren rock areas. Mot likely this change involved the following sequence of stages:

   A. Lichens-mosses-annual herbs-wood shrubs
   B. Annual herb-weedy shrubs-lichens-mosses
   C. Woody shrubs-mosses-lichens-annual herbs
   D. Mosses-annual herbs-woody shrubs-lichens

4. Main watershed regions and their problems are:

   A. The northern mountain region
   B. The uplands of northern Punjab
   C. The western mountain region
   D. The southwest Boluchistan plateau
   E. All of the above

5. Watershed regions of Pakistan is/are:

   A. Which are sufficiently homogeneous in themselves
   B. But distinct from each other in two major characteristics i.e., land form and climate, the factors which mainly determine the framework for watershed management
   C. Both (a) & (b)
   D. None of these

6. Cold and hot stratification is:

   A. To activate dormant embryo
   B. To help after ripening of embryo
   C. Moist stratification is done at temperature varying from 0 – 10
   D. All of the above

7. Winds – Hot and desiccating winds blow from _____ at the rate of 80-96 km per hour and decrease the efficiency of the already meager rainfall in the plains areas:

   A. April to September
   B. June to October
   C. July to November
   D. None of these

8. Temperature – with June the hottest month, summer (May to August) in plains is very hot and daily maximum temperature normally exceed 40

   A. Upper Punjab
   B. Upper Sind
   C. Upper KPK
   D. None of these

9. An association between two organisms belonging to different species, which live together for mutual benefit or on partner gets benefit and other, is neither benefited nor harmed is known as:

   A. Predation
   B. Parasitism
   C. Symbiosis
   D. None of these

10. The river Periyar gets pollution mainly from:

    A. Tanneries
    B. Paper factories
    C. Chemical factories
    D. Sugar mills