[lemma=animal] [□=□]
[lemma=animal] [tag=□]
[lemma=animal] [lemma=□]
Operant conditioning procedures show how animals maintain their choice for a preferred feed as it becomes increasingly difficult to obtain . Selenium is a critical part of a major antioxidant enzyme that humans and animals produce to protect delicate cellular components against damage from oxygen free radicals . Or is their understanding of evolution so warped they believe that scientists actually expect to see one animal give birth to a completely incomparable creature ? The few observations on hippocampal animals fit the same general pattern , with the exception of aggression . Traditional hunting and consumption of the animals serve important economic , cultural and social functions .