$A$ plant being eaten by a herbivore,which in turn is eaten by a carnivore,constitutes a:

If a bamboo plant is growing in a forest,what will be its trophic level?

To make the study of global ecosystem easier,it is broadly divided into how many basic categories?

What is formed by the interactions between biological communities and their environment?

In a pond,we see plants which are free-floating; rooted-submerged; rooted-emergent; and rooted with floating leaves. Identify the type of plant for each of the following:

Plant Name	Type
$(1)$ Hydrilla	....................
$(2)$ Typha	....................
$(3)$ Nymphaea	....................
$(4)$ Lemna	....................
$(5)$ Vallisneria	....................

Into how many trophic levels can the detritus food chain be divided?