Gause’s principle of competitive exclusion states that

The principle of competitive exclusion was stated by

Statements

$I.$ Recent studies support competition as suggested in 'Gauses's Competitive Exclusion Principle'

$II.$ Gause's hypothesis says if two species compete for same resources then one will be eliminated by another species

$III.$ More recent studies point out that species facing competition might evolve mechanisms that promote co-existence rather than exclusion

$IV.$ Gause's competitive exclusion principle is effective when resources are in excess

$V.$ Unlimited resources give better opportunity for adaptation

Choose the correct combination of statements

While explaining interspecific interaction of population, $(+)$ sign is assigned for beneficial interaction,$(-)$ sign is assigned for detrimental interaction and $(0)$ for neutral interaction. Which of the following interactions can be assigned $(+)$ for one species and $(-)$ for another species involved in the interaction?

A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is