Explain commensalism, with the help of an example.

1.	Explain commensalism, with the help of an example.
Answer» Commensalism - commensalism is an interaction in which smaller partner, called commensal, is benefitted while the large partner, called host, is neither benefitted nor harmed e.g. orchids as epiphytes on a mango branch.

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
Rerrange the following in an increasing order of their basic strengths: `C_(6)H_(5)NH_(2),C_(6)H_(5)N(CH_(3))_(2),(C_(6)H_(5))_(2)` NH and `CH_(3)NH_(2)`.
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Explain commensalism, with the help of an example.

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