Relationship between nitrogen fixing bacteria and a legume plant is described as:

Related Mcqs:

1. The bacteria, which reduce nitrates in the soil to gaseous nitrogen, are known as denitrifying bacteria such as:

   A. Nitromonas
   B. Pseudomonas
   C. Nostoc
   D. Rhizobium

2. According to Mc Dougal, the parasitism caused due to fungi and bacteria represent a symbiotic relationship which is:

   A. Social and antagonistic
   B. Nutritive and antagonistic
   C. Social and reciprocal
   D. Nutritive and reciprocal

3. The mycorrhizae present in association with higher plant roots are best described as:

   A. Keystone species
   B. Edge species
   C. Critical link species
   D. Edaphic pod species

4. Study of relationship between communities and environment is called:

   A. Autecology
   B. Ethology
   C. Ecology
   D. Syncology

5. The relationship between the alga Microcystis and the surrounding fauna corresponds to:

   A. Amensalism
   B. Parasitism
   C. Predation
   D. Exploitation

6. The relationship between the alga Cladophora and the snail shell on which it grows corresponds to:

   A. Commensalism
   B. Predation
   C. Neutralism
   D. Mutualism

7. The relationship between a climber and the host corresponds to:

   A. Neutralism
   B. Mutualism
   C. Parasitism
   D. Commensalism

8. Commensalism is a relationship between two organism in which:

   A. One is benefitted, other remains unaffected
   B. One is benefitted, other remains unaffected
   C. Both are benefitted
   D. Both are unaffected

9. The association of nodule bacteria with leguminous roots is known as:

   A. Saprophytism
   B. Symbiosis
   C. Epiphytism
   D. Parasitism

10. In a forest ecosystem, the numerical relationship between the producers and herbivores:

    A. Producers more than herbivores
    B. Producers equal to herbivores
    C. Producers less than herbivores
    D. Variable