Machinery purchased for $69,600 by Tamarisk Co. in 2016 was originally estimated to have a life of 8 years with a salvage value of $4,640 at the end of that time. Depreciation has been entered for 5 years on this basis. In 2021, it is determined that the total estimated life should be 10 years with a salvage value of $5,220 at the end of that time. Assume straight-line depreciation. Prepare the entry to correct the prior years' depreciation, if necessary.
Prepare the entry to record depreciation for 2021.

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.'

answer///supply is elastic, and demand is inelastic;