Chapter 1: Bio Flashcards
(22 cards)
Principle 1
Cells ate the simplest units of life
Principle 3
Living organisms use energy
Principle 3
Living organisms interact with their environment
Principle 4
Living organisms maintain homeostasis
Principle 5
Living organisms develop and grow
Principle 6
All organisms contain genetic materials compose of DNA
Principle 7
Populations evolve
Principle 8
All species are related by an evolutionary history
Principle 9
Structure determines function
Biology
Study of life; experimental science; affects our society
Levels of organization
Atoms Molecules Cells Tissues Organs Organism Population Community Ecosystem Biosphere
Unity
Common characteristics of life
Diversity
Different forms of unicellular and multicellular life
When did life on earth begin?
3.5 to 4 billion years ago
Vertical descent w mutation
Transfer of genetic info from parents to offspring
Horizontal gene transfer
Exchanging genetic info
Natural selection
An increased frequency of beneficial mutations in a pop. over time
Taxonomy
Grouping based on common ancestry
3 Domains
Bacteria, Archaea, Eukarya
Classification of Living Organisms
Domain Supergroup Kingdom Phylum Class Order Family Genus Species
Science is…
Observation, identification, experimental, investigation, and theoretical explanation
Scientific method
Observation Hypothesis Experiment Data Conclusion