Properties of Life 1.1 AP Biology Mini Lecture

Biology—the scientific study of living things “Living things”—All the diverse organisms descended from a single-celled ancestor (a single common ancestor) All organisms come from 3 Domains Archaea – special living bacteria Bacteria – regular normal everyday bacteria Eukarya – all eukaryotes (Protists, Fungi, Plants and Animals)

Characteristics of Life – for all organisms for all domains Order - all life have common chemical components (DNA etc.) and a cell Energy Processing - metabolism, cellular respiration Homeostasis - regulate internal environment Response to the environment - respond to stimulus Reproduction - replicate genetic information Growth and Development - grow into adults, cellular specialization Evolutionary Adaptation- change due to environment and gradual changes in genes

Chloroplasts and Mitochondria Endosymbiotic Theory It holds that the organelles  evolved from symbiosis of individual single-celled prokaryotes  are thought to represent formerly free-living prokaryotes  One piece of evidence is that both organelles have their own DNA! Video

All organisms come from 3 Domains Archaea – special living bacteria Bacteria – regular normal everyday bacteria Eukarya – all eukaryotes (Protists, Fungi, Plants and Animals)

Welcome to Bozeman Biology Youtube guru on biology and other science areas. How do you do well in this class? Bozeman Biology- Metacognition 10 minutes – notes – 10 tips

1.3 Hierarchy of Life Atoms Molecules Macromolecules Organelles Cells Tissues Organs Organ systems Organisms Population Community Ecosystem biosphere

Definitions Metabolism – sum of all the chemical reactions that occur Included cellular respiration, digestion etc. Homeostasis – maintaining an internal condition (temperature, pH etc.)

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