BIOL 1001 Chapter : Biol 1201 Outline1
Document Summary
Organisms within a species are variable (e. g. , some are tall some are short) Chapter 1 themes in the study of life. About 1. 8 million species have been identified and named! With so many different species there are many similarities (see fig 1. 1). 1--- evolution is a central theme in biology. The ability to evolve is built into organisms. Conclusion: more good genes survive and therefore the population changes. 2 --- life contains an order of structural levels with each level building on the levels beneath it. >>>>> hierarchy of biological organization (see fig 1. 4) (the definitions for these are handled separately, here you should concentrate on the organization) Tissues (not present in prokaryotes or all eukaryotes) Variability means some are abetter@ suited to survival. Variability comes from the genes and genes are inherited. Organs (not present in prokaryotes or all eukaryotes) Organ systems (not present in prokaryotes or all eukaryotes)