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.
Mount Logan, Yukon. Environmental conditions and organisms vary greatly from low to high elevations
Comparison of Selected Respiratory Conditions
Notice that there are conditions when the port fuel-injector, located in the intake manifold, and ...
The pH scale is logarithmic. A low pH indicates acidic conditions, whereas a high pH indicates ...
Genomic and fossil evidence has been used to estimate the times of divergence of human and Neanderth
RUSP 34 Core Conditions for Newborn Genetic Screening