Alocal pet supplies boutique had a good year with rising revenues and reduced operating costs resulting in personal income for the owner of nearly $100,000. one-third of that went to local, state, and federal income taxes and another third went to pay for a home mortgage, car payments, food, clothing, and other necessities. what is the remaining third called? a. gross incomeb. bonus incomec. discretionary incomed. disposable incomee. profit

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; rapid growth in buyer demand and high buyer switching cost;