- Endothermic tetrapods are capable of higher levels of activity over longer periods of time; it takes longer for the muscles of endotherms to enter the anaerobic physiological state characterized by ______________ production.
- What are the best rocks for radiometric dating?
- If predators are endothermic, they should require more energy than if they were ectothermic, and this should be reflected in the weight proportions of predators to prey, or predator/prey
- Modern mammals and birds (and maybe dinosaurs) grow convoluted sheets of delicate, tissue-covered bone, called ________________, in the nasal cavities to minimize water loss in endothermy.
- In some organisms, called ________________, temperature fluctuates.
- Brain ______________are internal casts of the braincases of dinosaurs.
- Can Radiometric dating techniques be used to date sedimentary rock?
- ______________ is the study of the various integrated functions of an animal.
- ________________ are organisms that use external sources of heat to regulate their temperatures.
- ______________ are organisms that regulate their temperature internally.
- radioactive isotope found in all living things
- When index fossils are found in rock layers in different areas of the world it indicates that the rock layer...
- a fault or body of rock is younger than any other body of rock it cuts through according to the law of _______ ________.
- A varve is most like a ________________.
- What type of rock are almost all fossils discovered?
- How many half-lies would be necessary for a sample of parent isotopes to decay to the point that only one-fourth of the sample is composed of parent isotopes?
- What is used to date objects less than 70,000 years old