gly 1102 topic 30

Large ectothermic dinosaurs would have more trouble maintaining a constant body temperature than smaller ones because of their large body volume.
false
Dr. Bakker finds the predator/herbivore dinosaur ratios similar to Cenozoic mammal (endothermic) populations and interprested this as strong evidence for endothermy.
true
Endothermic predator-prey ratios should be lower than for ectotherms.
true
Today feathers are found only on endothermic birds.
true
Most ectotherms have sprawling postures.
true
Endotherms require more food per body weight than is the case for ectotherms.
true
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Mammals have a fully divided 4 chamber heart and numerous fossilzed dinosaurs have only 2 chambers.
false
Endotherms require great motor and sensory control which is associated with larger and more complex brains.
true
Most endotherms are egg-layers.
false
Most endotherms have an erect gait.
true
Many dinosaurs have lamellar-zonal bone (growth rings), a common characteristic of living ectotherms with seasonal pauses in their growth.
true
Growth rings occur in all living endotherms because of a seasonal pause in bone growth as food supplies are limited or climate unfavorable.
false
Endotherms must eat more food per body volume than ectotherms because of their higher level of activity.
true
The rate of metabolic reactions depends on the internal body temperature.
true
The density of blood vessels in bone is higher in all ectotherms than endotherms.
false
Ectothermic animals maintain a body temperature at 36-40 degrees Celsius.
false
Endotherms require high blood pressure and rapid blood circulation to allow oxygen and energy to circulate quickly through the body.
true
The optimum temperature of mammals is usually lower than those in the environment around them.
false
Ectothermic animals develop their heat from the external environment rather than metabolic sources.
true
Dinosaurs have complex scrolls of thin bone within the nasal cavity (turbinates) once covered with mucous membranes.
false