What is the significance of mimicry?

Differentiate between Commensalism and Mutualism.

Gause's law is related to:

Study the following four statements $(1-4)$ and select the two which are correct:
$(1)$ Lion eating deer and sparrow feeding on grain are ecologically similar in being consumers.
$(2)$ The predator starfish $Pisaster$ helps in maintaining species diversity of some invertebrates.
$(3)$ Predators often lead to the extinction of prey species.
$(4)$ Production of chemicals such as nicotine and strychnine by plants is a metabolic disorder.
Which two statements are correct?

Which of the following is an example of brood parasitism?

Match the items in Column-$I$ with those in Column-$II$:

Column-$I$	Column-$II$
$(a)$ Herbivores-Plants	$(i)$ Commensalism
$(b)$ Mycorrhiza-Plants	$(ii)$ Mutualism
$(c)$ Sheep-Cattle	$(iii)$ Predation
$(d)$ Orchid-Tree	$(iv)$ Competition

Select the correct option from the following: