Relative to shoots, the roots can be very massive in plants of:

Related Mcqs:

1. 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

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

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

3. Humidity – except for about 64 km inland coastal belt, where values of the relative humidity are the highest, especially during summer season with August as a humid month, the relative humidity in most part of the country is moderate, falling below _____ in the plains:

   A. 10%
   B. 15%
   C. 20%
   D. 25%

4. Crops in part at least, originating from stool shoots or by other vegetative means:

   A. Accessory system
   B. Coppices system
   C. Uniform system
   D. None of these

5. ________ consists in clear-cutting a fixed area annually which is regenerated by coppice shoots:

   A. Simple coppice system
   B. Complex coppice system
   C. Uniform system
   D. None of these

6. Dominant tree: Including all trees which form the upper most leaf canopy and have their leading shoots free. These are usually sub-divided into:

   A. Predominant trees comprising all the largest trees which determine the general top level of the canopy
   B. Codominant trees which fall short of this, averaging about 5/6th of the height of predominant
   C. Trees with forked leader and similar defects
   D. All of the above

7. The development of soil structure from single grained or massive states conditions:

   A. Single grained: Where each soil particles function as an individual e.g. Sandy soil
   B. Massive: Clay fills the spaces and pores so that the soil becomes dense and forms clods
   C. Both (a) & (b)
   D. None of these

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

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

9. 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

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