MCQ
Some blue green algae can be used as biofertilizer as they are
- APhotosynthetic
- BSurrounded by mucilage
- CGrowing every where
- ✓Capable of fixing nitrogen
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$(a)$ The cattle egret and grazing cattle
$(b)$ Barnacle balanus and Barnacle chathamalus
$(c)$ Goat and Abingdon turtle from Galapagosisland
$(d)$ Barnacles growing on the back of whale
| $(I)$ | $(II)$ | $(III)$ |
| $(a)$ Parasitism | $(i)\,-,0$ | $(A)$ Both get benefitted |
| $(b)$ Amensalism | $(ii)\,-,-$ | $(B)$ One get harmed other has no effect |
| $(c)$ Competition | $(iii)\,+,-$ | $(C)$ Both get harmed |
| $(d)$ Mutualism | $(iv)\,+,+$ | $(D)$ One is harmed and second is benefited |