Answer the following questions in detail.

Question

Study the table given below and answer the questions that follow:

Species A	Species B	Name of interaction
(+)	(+)	(A)
(-)	(-)	(b)
(+)	(-)	(c)
(+)	(0)	(d)

+ = Beneficial interaction
- = Detrimental interaction
0 = Neutral interaction
Identify a, b, c and d in the given table and explain any three of them with the help of an example each.

Vidyadip · Accepted Answer

1. (+) and (+): Mutualism: It is defined as the interspecific interaction in which both the partners are benefitted, e.g. the fungus and the alga in a lichen. 2. (-) and (-): Competition: It is a type of interaction either among the individuals of the same species intraspecific competition) or between the individuals of two different species (interspecific competition). 3. (+) and (-): Predation: It is an interspecific interaction, where one animal, called predator, consumes the other animal, called prey; one is benefitted and the other is harmed, c.g. the lion eating deer. 4. (+) and (0): Commensalism: It is an interspecific interaction in which one of the species is benefitted and other is neither benefitted nor harmed, e.g. an orchid growing on a mango tree.

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