l economic systems (capitalist, communist, or any other) face similar economic problems. which of the following questions would not be faced by all economies? 1)how many resources will be devoted to maintaining and increasing future capacity? 2)what will be produced and how? 3)for whom will the goods be produced? 4)how can markets be kept competitive?

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.'

exaclty 30 degrees celcius is the answer