Which of the following statements best characterizes the disability-adjusted life year? A.
A measure of the overall burden of disease on a society.
B.
A measure of years lost due to premature death or disability.
C.
It describes the yearly living conditions of people with disabilities.
D.
It describes the yearly effect people with disabilities have on a nation's resources.
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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; 33,000;

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answer; customers within the organization