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

Refer to the given table that summarizes the interactions between two organisms (organism $1$ and organism $2$). Identify the types of interaction ($A, B$,and $C$) and select the correct answer.

Effects on Organism $1$	Effects on Organism $2$ (Benefit,Harm,No Effect)
Benefit	Mutualism,Predation,$B$
Harm	$A$,Competition,Amensalism
No Effect	Commensalism,$C$,$-$

$(i)$ $A$ can be either predation or parasitism.
$(ii)$ $B$ can be either commensalism or amensalism.
$(iii)$ $C$ can be amensalism.
$(iv)$ $A$ can be amensalism.

Competition is best defined as a process in which the fitness of one species (measured in terms of its '$r$',the intrinsic rate of increase) is significantly:

While living in and on the host species, the animal parasite has evolved certain adaptations. Describe these adaptations with examples.

Which of the following is most commonly cited as a predator?

What type of relationship is observed between insect-pollinated plants and their pollinators?