Exam 1 Study Guide--Chapters 1-3 (partial)

Exam 1 Study Guide--Chapters 1-3 (partial) - Exam 1 Study...

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Exam 1 Study Guide Chapter 1—An Introduction to Life on Earth Characteristics of Life o Complex , organized structure Biosphere Ecosystem Community Species Population earth’s surface—living/nonliving—2+living—similar—1living Multicellular Organism Organ System Organ Tissue Cell living thing—2+Organs—several tissues—several cells—smallest unit Organelle Molecule Atom Subatomic Particle structure in cell—combo of atoms—smallest particle—particles make atom o Respond to stimuli Organisms react to internal and external stimuli. o Homeostasis Organisms regulate internal environment in order to stay alive. o Acquire material and energy Heterotrophs —feed off of others. Autotrophs —make own food. o Growth Organisms grow during their life. o Reproduction Organisms reproduce their own kind. o Evolution Environment changes, organisms must change. Natural selection —survival of the fittest. Domains o 2 major organized groups: Prokaryotic : Bacteria and Archaea ; no nucleus, no organelles Eukaryotic : Eukarya ; nucleus, cytosol and membrane organelles Kingdoms o Bacteria— Prokaryotic/Unicellular/Absorption and Photosynthesis o Archaea— Prokaryotic/Unicellular/Absorption and Photosynthesis o Protista—Eukaryotic/ Unicellular/Absorption, Photosynthesis, and Ingestion
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o Fungi—Eukaryotic/Multicellular/Absorption o Plantae—Eukaryotic/Multicellular/Photosynthesis o Animalia—Eukaryotic/Multicellular/Ingestion
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Chapter 2—Atoms, Molecules, and Life Atoms o Atoms —smallest unit of matter; retains physical and chemical properties of elements. Neutrons uncharged ; in nucleus Protons positively charged; in nucleus Electrons negatively charged; orbit around nucleus o Elements —collections of atoms of the same type; can’t be broken down into other substances. o Atomic Weight —number of protons plus neutrons. Isotopes —same element but different atomic weights, due to different numbers of neutrons. Electron Orbitals
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This note was uploaded on 10/30/2011 for the course BIOLOGY 1001 taught by Professor Crousillac during the Summer '10 term at LSU.

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Exam 1 Study Guide--Chapters 1-3 (partial) - Exam 1 Study...

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