Observe the set of $4$ figures $A$, $B$, $C$ and $D$ and, answer the following questions
$(i)$ Which one of the figures shows mutualism ?
$(ii)$ What kind of association is shown in $D$ ?
$(iii)$ Name the organisms and the association in $C$.
$(iv)$ What role is the insect performing in $B$ ?
$(i)$ Figure $'A'$ shows' mutualism (plant and pollinator insect).
$(ii)$ Figure $'B'$ shows phytophagy (insect that feed on sap of the flower).
$(iii)$ Figure$ 'C'$ shows commensalism (cattle egret and grazing cattle)
$(iv)$ In figure $'D'$ shows predation (leopard killing deer and eating it)
What is a keystone species
Which one of the following is categorised as aparasite in true sense?
Mycorrhiza, a relationship between fungi and roots of higher plants is
Competition occurs when