Why does a bird sing?A. Operation of the voice box (syrinx)B. Vibrating boneC. Bird need to communicate with its mate during breeding seasonD. Both A and B

Why does a bird sing?A. Operation of the voice box (syrinx)B. Vibratin

1.	Why does a bird sing?A. Operation of the voice box (syrinx)B. Vibrating boneC. Bird need to communicate with its mate during breeding seasonD. Both A and B
Answer» Correct Answer - C Birds need to communicate with its mate during breeding season.

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Define the following terms and give one example for each: (a) Commensalism (b) Parasitism (c) Camouflage (d) Mutualism (e) Interspecific competition
Select the statement which explains best parasitism. (a) One organism is benefited. (b) Both the organisms are benefited. (c) One organism is benefited, other is not affected. (d) One organism is benefited, other is affected.
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Select the statement which best explains commensalism (a) One organism is benefitted (b) Both the organisms are benefitted (c) One organism is benefitted , other is not affected (d) One organism is benefitted , other is affected .
Each environment can support a limited population depending upon itsA. Biotic potentialB. Carrying capacityC. NatalityD. Reproductive potential
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In an area, if there are 200 Parthenium plants but only a single huge banyan tree with a large canopy, the population density is measured in terms ofA. Number or biomassB. Number of per cent coverC. Biomass or per cent coverD. Number, biomass or per cent cover.
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Why does a bird sing?A. Operation of the voice box (syrinx)B. Vibrating boneC. Bird need to communicate with its mate during breeding seasonD. Both A and B

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