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Amphibians utilize olfactory senses for recognition of mates and courtship. 

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Non-shivering thermogenesis is where body temperature is increased in mammals due to rapid muscle contraction (shivering). 

What is the function of the pyloric stomach in starfish? 

During a typical reproductive cycle female mammals undergo modification of their uterus and vagina to prepare for young. 

How are molluscs organized? 

Mammals are endothermic and regulate their temperature through the nervous and endocrine system. 

What does lamprey saliva contain that allows them to feed on blood? 

cover the bodies of birds and serve in making an aerodynamic structure while serve to insulate birds. 

Nematodes are round because the body muscles contract against their fluid interior and generate equal outward force.