Which of the following are consumers of second order

$10\%$  law of flow of energy in ecosystem was proposed by

In an ecosystem bacteria are considered as

What will happen to an ecosystem if :

$(a)$ All producers are removed;

$(b)$ All organisms of herbivore level are eliminated; and

$(c)$ All top carnivore population is removed

A plant being eaten by a herbivorous which in turn is eaten by a carnivorous makes