MCQ
In which era mammals and birds evolved?
- AMesozoic
- BCenozoic
- CPalaeozoic
- DPrecambrian
Explanation:
The birds and mammals evolved during the Coenozoic (new life) era. The decline of reptiles allowed diversification of birds and mammals.
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| $(I)$ | $(II)$ | $(III)$ |
| $(a)$ 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 |