If an animal's internal system determines that there is too much water inside it, how will it likely respond to maintain homeostasis? a. it will expel the excess water as urine. b. it will increase heat production. c. it will constrict bloodflow to the arms and legs. d it will release the hormone glucagon.

A.  It will expel the excess water as urine.

Homeostasis is the natural phenomena which describes the fact that how an organism maintains it's internal environment with respect to the changes that occur externally. The animal's internal system should release the urine in order to expel out excess water inside it. The excretory system of the organism has to work efficiently in order to expel out the water so as to maintain the homeostasis.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

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