13. Tome tres salmos cualesquiera y ubíquelos en unas de las clasificaciones de los salmos del punto anterior y diga el ¿Por qué? lo ubico en dicha clasificación. I
14 Site un salmo mesiánico y describa el ¿Por qué? este es clasificado como​

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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