The interaction observed in this diagram is

Competition for food,light,and space is most severe between two:

Two different species cannot coexist in the same niche for a long time. This rule is known as .......

Which one of the following population interactions is widely used in medical science for the production of antibiotics?

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?

What is the term for an interaction where both organisms benefit and are essential for each other's survival?