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Study the table given below in regard to population interactions and the questions given below.

Species A Species B Name of interaction
- 0 a
+ - b
- - c
+ + d
+ 0 e


[(+) plus – beneficial interaction; (-) minus – detrimental interaction; 0 (zero) – neutral interaction.
(a) Identify the interactions a to e 
(b) Explain each one.

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A – B

(a) Amensalism – Species A harmed species B unaffected

(b) Predation/parasitism – Species A benefited species B harmed

(c) Competition – Species A and B mutually inhibited

(d) Mutualism – Both A and B benefitted

(e) Commensalism – Species A is benefitted Species B is unaffected.

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