The Origin of Species
Speciationthe origin of new speciesis at the focal point of evolutionary
theory because the appearance of new species is the source of biological diversity.
Microevolution is the study of adaptive change in a population.
Phylogenies are based on common ancestries inferred from fossil, morphological,
and molecular evidence
Sedimentary rocks are the richest source of fossils.
Fossils are the preserved remnants or impressions left by organisms that lived
in the past.
Phylogenetic & Molecular Genetics
Terms and Definitions
analog - A feature that appears similar in two taxa which have originated from two
ancestor - Any organism, population, or species from which some other organism,
A Tour of the Cell
Overview: The Importance of Cells
All organisms are made of cells.
o Many organisms are single-celled.
o Even in multicellular organisms, the cell is the basic unit of structure
The cell is the simplest collection of matte