Suppose that the interest rate on dollar accounts is equal to 2% (i$ = 0.02), the interest rate on polish zloty accounts is equal to 4.5% (izł = 0.045), and the expected exchange rate between the dollar and the zloty one year from now is ee = 4 zł/$. assume that the (uncovered) interest parity holds. what would the spot rate, e, be if the expected exchange rate remains the same and the interest rate on polish assets declines to izł = 0.02? (answer in zł/$.)

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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