In an association of two animal species, one is a termite which feeds on wood and the other is a protozoan Trichonympha present in the gut of the termite. What type of association they establish ?
In commensalism
Match the column $I$ and $II$
Column - $I$ | Column - $II$ |
$(a)$ Parasitism | $(i)$ $++$ |
$(b)$ Commensalism | $(ii)$ $+-$ |
$(c)$ Amensalism | $(iii)$ $0+$ |
$(d)$ Mutualism | $(iv)$ $0-$ |
The principle of competitive exclusion was stated by
What is Mycorrhiza ?