32 Name the two things that contribute most to birds having the ability to keep their body weight down.
33 Hollow bones & reduced organs
34 Which of the following is not a characteristic of aerodynamic lift as it pertains to the airfoil wing design? a. Air travels a further distance above the wing than below b. The pressure below the wing is higher than above the wing c. Air molecules become packed tighter above the wing than below the wing d. Air molecules travel slower below the wing than above the wing
35 Air molecules become packed tighter above the wing than below the wing
36 How are Saurischian dinosaurs distinguished from Ornithischian dinosaurs?
50 What major steps did the following proto-mammals achieve that led them on the path to becoming mammals? Pelycosaurs Therapsids Cynodonts
51 Pelycosaurs – Sail used for the beginning of thermoregulation Therapsids – Legs moved under the body Cynodonts – Lumbar ribs reduced
52 How did the present distribution of marsupials, monotremes, and placental mammals come to be?
53 -Monotremes and marsupials evolved on Pangaea and spread out. -Australia, Antarctica, & India broke away -Placental mammals developed on Laurasia and conquered the rest of the landscape except for A,A, and I -India re-collided with Asia flooding it with placental mammals and Antarctica froze -Australia the only place left isolated and warm enough to support mammalian life