In Exercises 512, if possible, find (a) (b) (c) and
Trends in Evolution: ● Larger brains ● Larger and more muscles ● Upright limb posture (appendages directly underneath body weight) ● Nocturnal habits (led to development of 3 middle ear bones and whiskers for sensing at night) ● Homeothermy maintenance of a stable internal body temperature despite environmental influences; can be regulated through behavior or metabolism ○ Example: Pelycosaurs (not a dinosaur) evolved large flat organ on top of their bodies with lots of blood flow through; could cool themselves or turn to sun to absorb heat ○ Opposite=Poikilothermy internal body temperature varies with environmental conditions These developments cost a lot metab