Suppose that over the last twenty-five years a country's nominal gdp grew to three times its former size. in the meantime, population grew by 40 percent and prices rose by 100 percent. what happened to real gdp per person?
a. it more than doubled.
b. it increased, but it less than doubled.
c. it was unchanged.
d. it decreased.

B. It increased, but it less than doubled

Explanation:

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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