How many hilton honors members are there?

There are more than 65 million members worldwide in Hilton honors.

There are many hospitality companies in the world. Hilton honors is one of the largest and fast growing company in hospitality. There is gold and diamond membership also with many benefits. It has more than 5000 properties in 103 countries worldwide.

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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