The following information relates to Purcaro, Inc. (Be careful of order of the columns): For the Year Ended December 31, 2018 2019 Plan assets (at fair value) $1,360,000 $1,824,000 Pension expense 570,000 450,000 Projected benefit obligation 1,720,000 1,934,000 Annual contribution to plan 600,000 450,000 Accumulated OCI (PSC) 480,000 420,000 The amount reported as the liability for pensions on the December 31, 2019 balance sheet is

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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