Answer to Question 1
Two special conditions appear to be necessary: rapid burial and the possession of hard parts. When an organism perishes, its soft parts are usually quickly eaten by scavengers or decomposed by bacteria. Occasionally, however, the remains are buried by sediment. When this occurs, the remains are protected from the environment where destructive processes operate. Rapid burial, therefore, is an important condition favoring preservation. In addition, animals and plants have a much better chance of being preserved as part of the fossil record if they have hard parts. Although traces and imprints of soft-bodied animals, such as jellyfish, worms, and insects exist, they are not common. Flesh usually decays so rapidly that preservation is exceedingly unlikely. Hard parts, such as shells, bones, and teeth, dominate in the record of past life.
Answer to Question 2
It is issued when sustained winds of 199 kilometers (74 miles) per hour or higher are expected within a specified coastal area in 24 hours or less.
The eukaryotic cell cycle and cell division in an organism with six chromosomes.
A fossil ammonite.
Possible relationships between fossil and living primates.
Conditions Treated by Physical Therapy Cont
The pH scale is logarithmic. A low pH indicates acidic conditions, whereas a high pH indicates ...
If CP for an ideal gas is 35.4 J/molK, which of the following is CV for this gas?