Competition for food,light,and space is most severe between two:

Mycorrhizae are an example of

Even a plant species,which makes its own food,cannot survive alone; it needs soil microbes to breakdown the $A$ matter in soil and return the $B$ nutrients for absorption. And then,how will the plant manage pollination without an animal agent? It is obvious that in nature,animals,plants and microbes cannot live in $C$ but interact in various ways to form a biological community. Choose the correct option for $A, B$ and $C$.

Which one of the following is $NOT$ an example of commensalism?

Predators play an important role in:

Louse is an ectoparasite of