Zoology - Organisms and Populations Question with Solution | TestHub

In a species interaction where one species benefits by harming the other is referred to as parasitism.

Ammensalism is a type of biological association between two organisms where one of the two remains unaffected while the other is adversely affected by the relationship.

Classic example ammensalism is displayed between fungusPenicilliumand bacteria, wherePenicillium secretes antibiotic that inhibits the growth of bacteria (adversely affected) andPenicilliumremains unaffected. Another example is between the black walnut (Juglans nigra), which secretes juglone, a substance that destroys many herbaceous plants within its root zone.