Biology Eoct Study Guide Answers
Biology Eoc Study Guide Answer Key 2016
Biologists use it to determine the relative ages of fossils within a time period. (These isotopes act as clocks for measuring time.
To use this method, scientists must know the following:1.The half-life of the isotope being measured2.How much of the isotope was originally present in the fossil or in the rock containing the fossil 3.How much of the isotope is left) (By using the ages of fossils, interrelationships among organisms can be determined. Organizing similar fossils by age shows how species become more complex over time.
Biology Eoc Study Guide Answers Volusia County
An example of advancing complexity is horse evolution. A phylogeny is a description of the lines of descent of plants and animals. A phylogenetic tree shows the interrelationship of several species. Fossil collections are often not complete enough to determine any evolutionary patterns or traits. In many cases, a biologist will infer likely phylogenies by comparing morphological features, DNA sequences, and chromosomal characteristics.).