Identify the likely organisms $(1), (2), (3)$ and $(4)$ in the food web shown below.
$(a)$-Deer,$(b)$-Rabbit,$(c)$-Frog,$(d)$-Rat
$(a)$-Dog,$(b)$-Squirrel,$(c)$-Bat,$(d)$-Deer
$(a)$-Rat,$(b)$-Dog,$(c)$-Tortoise,$(d)$-Crow
$(a)$-Squirrel,$(b)$-Cat,$(c)$-Rat,$(d)$-Pigeon
In forest ecosystem, fungi is grouped as
In an ecosystem, the insectivorous plants are placed in
Transfer of material and energy from one ecosystem to other ecosystem is best examplified by
An ecosystem must have continuous external source of
In an ecosystem energy flows in