AP Bio 1 - Its Origin and Evolution ORGANIZATION OF LIFE ON EARTH Levels of Organization Biosphere Ecosystems Communities Populations Organisms Organs

AP Bio 1 - Its Origin and Evolution ORGANIZATION OF LIFE ON...

This preview shows page 1 - 24 out of 100 pages.

Click to edit Master subtitle style 10/5/09 Organization of Life on earth Its Origin and Evolution
10/5/09 Levels of Organization Biosphere l Ecosystems l Communities l Populations l Organisms l Organs and Organ Systems l Tissues l Cells l Organelles l Molecules
10/5/09 Levels of Organization
10/5/09 Biosphere Everywhere within the Earth’s atmosphere where life exists.
10/5/09 Ecosystems The biotic and abiotic factors within an environment Interactions between organisms Interactions between organisms and the environment Cycling of Nutrients Energy flow
10/5/09
10/5/09 Community All living organisms in a particular region
10/5/09 Population All individuals of a species in a particular area
10/5/09 Organism A single living thing
10/5/09 Organs & Organ Systems Organ Specialized body parts made of tissues Tissues work together to perform a specific function l Organ System Groups of organs that work together to perform specific functions
10/5/09 Tissue A group of similar cells
10/5/09 Cell l Basic unit of: Life Structure and function l Contains DNA
10/5/09 Organelle Structural component of a cell
10/5/09 Molecule Chemical structure consisting of atoms
10/5/09 Diversity of Life Domain Bacteria Prokaryotic l Domain Archaea Prokaryotic Live under extreme conditions l Domain Eukarya Protists (unicellular eukaryotes) Kingdom Plantae (photosynthetic) Kingdom Fungi (decomposers) Kingdom Animalia (ingest others)
10/5/09 Evolution On the Origin of Species, Charles Darwin Contemporary species arose from a succession of ancestors “descent with modification” Natural Selection Mechanism for descent with modification
10/5/09 Early Earth & the Origin of Life Chemical and physical processes on early Earth may have produced very simple cells through a sequence of stages: 1. Abiotic synthesis of small organic molecules 2. Joining of these small molecules into polymers 3. Packaging of molecules into “protobionts” 4. Origin of self-replicating molecules
10/5/09 l Earth formed about 4.6 billion years ago l Earth’s early atmosphere contained water vapor and chemicals released by volcanic eruptions l Experiments simulating an early Earth atmosphere produced organic molecules from inorganic precursors, but such an atmosphere on early Earth
Click to edit Master subtitle style 10/5/09 Water vapor C H 4 N H 3 H 2 Electrod e Conden ser Col d wat er Cooled water containing organic molecules Sample for chemical analysis H 2 O Miller & Urey
10/5/09 Other Explanations synthesis near submerged volcanoes and deep-sea vents

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture