MCQ
When one organism is benefited without affecting the other, the interaction is called as:
- AParasitism
- BCommensalism
- CSaprophytism
- DSymbiosis
Explanation:
In commensalism, one species is benefitted without the other being harmed. It is of two types periodic contact and continuous contact.
Some examples of periodic contact commensalism are jackal and hyenas accompanying big cats like tiger or lions for eating small bits of left over of prey's body; sucker fish attaches to underside of shark and feed on small left over when shark is feeding.
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| List $I$ (Interacting species) | List $II$ (Name of interaction) |
| $A$. A Leopard and a Lion in a forest/grassland | $I$. Competition |
| $B$. A Cuckoo laying egg in a Crow's nest | $II$. Brood parasitism |
| $C$. Fungi and root of a higher plant in Mycorrhizae | $III$. Mutualism |
| $D$. A cattle egret and a Cattle in a field | $IV$. Commensalism |
Choose the correct answer from the options given below.
| Column $-I$ | Column $-II$ |
| $(A)$ Saccharomyces cerevisiae | $(i)$ Production of immuno-suppressive agent |
| $(B)$ Monascus purpureus | $(ii)$ Ripening of Swiss cheese |
| $(C)$ Trichoderma polysporum | $(iii)$ Commercial production of ethanol |
| $(D)$ Propionibacterium | $(iv)$ Production of blood-cholesterol lowering agents |