The price of bread was increased from #50 to #60 in 2003 and the quantity bought per week by a consumer decreased from 180 to 90 .
(a ) present the above in a table
(b) calculate the co - efficient of price elasticity of demand
(c )what type of elasticity is this
pls help.

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'

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