bulk filter-feeding (baleen only) (not to scale) Pleist. 1.8 Pliocene 5.3 Late bulk filter- feeding mастоphagy (teeth only) --- (teeth/baleen) 11.6 Middle 15.9 Early 54(3) 23.0- Late 28.0- 63(4)- J94(8) Early 76(4)L 100(13) large body size Ledentulous rostrum 92(5) 34.0- baleen elongated and flattened rostrum Late 99(9) 38.0- Middle small body size foreshortened rostrum fibrocartilaginous mandibular symphysis broad-based rostrum 48.6 Early 5.8 100(35) Figure 1. The phylogenetic tree of the Mysticeti. Question 1. Refer to Figure 1 above. What morphological traits does the new fossil, Janjucetus hunderi, share with the extant odontocetes? Miocene Sumododdi

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Animal Behavior

Animal behavior can be defined as all the things that animals do. In response to a stimulus, an animal performs a certain fixed action pattern, or FAP, of behavior. This response occurs to make the animal more adaptable to change. So, behavior is generally a stimulus-oriented response. A behavior is an expression of the capabilities of the nervous system. A stimulus is determined by the environment, while the nervous system determines a response.