On november 1, 2017, lotz company sold merchandise for $16,000, fob destination, with payment terms of 2/10, n/40. customer returns on this sale amounted to $4,000. the company received payment for the balance on november 10, 2017. the cost of goods sold was $3,600. calculate the amount of gross profit from these transactions. $12,400 $8,160 $8,400 $11,760

a ab

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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.'