Biology Multiple Choice Questions and Answers for Different Competitive Exams

Multiple Choice Questions on Biotic Interactions

1. Which one is true?
a) symbiosis when neither population affects each other
b) symbiosis when the interaction is useful to both the populations
c) commensalism when none of the interacting populations affect each other
d) commensalism when the interaction is useful to both the populations

2. A high density of elephant population in an area can result in
a) mutualism
b) Intraspecific competition
c) Interspecific competition
d) Predation on one another

3. Barnacles growing on the back of whale is an example for
Barnacles growing on the back of whale
a) mutualism
b) parasitism
c) amensalism
d) commensalism

4. Pencillium does not swallow the growth of bacterium Staphylococcus. This sort of relationship is called
a) commensalism
b) predation
c) amensalism
d) mutualism

5. Symbiosis is shown by
a) E.coli
b) Cuscuta
c) Rafflesia
d) Monotropa


6. When both partners are affected negatively the nature of interaction is
a) commensalism
b) competition
c) predation
d) amensalism

7. An association between two individuals or populations where both are benefitted and where neither can survive without the other is
a) competition
b) commensalism
c) mutualism
d) protocoperation

8. Which of the following interactions will not promote co evolution?
a) commensalism
b) mutualism
c) parasitism
d) interspecific competition

9. The effect of interspecific competition on niches is to make them
a) larger
b) smaller
c) more triangular
d) change location

10. Mycorrhiza represents
a) symbiotic association between a fungus and liverworts
b) parasitic association between a fungus and an alga
c) parasitic association between a fungus and roots of plants
d) symbiotic association between a fungus and roots of higher plants
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Answers
1. b) symbiosis when the interaction is useful to both the populations
2. b) Intraspecific competition
3. d) commensalism
4. c) amensalism
5. a) E.coli
6. b) competition
7. c) mutualism
8. a) commensalism
9. b) smaller
10. d) symbiotic association between a fungus and roots of higher plants

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