Wage rates are primarily based on the:
a.
institutional factors present.
b.
level of comparative advantage.
c.
extent to which the country is involved in trade with other countries.
d.
productivity of labor.

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 utilities; more money you have to pay out ; )

answer decisions made by individual households and firms;

answerconversion factor;