Topic 1.1: The Study of Life Flashcards
What are the 6 characteristics of life?
1) Organized
2) Requires materials and energy
3) Has the ability to reproduce and develop
4) Responds to its environment
5) Maintains an internal environment
6) Has the capacity to adapt to its environment
What are the levels of biological organization?
Atom
Molecule
Cell
Tissue
Organ
Organ System
Organisms
Species
Population
Community
Ecosystem
Biosphere
Define “Atom”
Smallest unit of an element; composed of electrons, protons, and nuetrons
Define “Molecule”
Union of two or more atoms of the same or different elements
Define “Cell”
The structural and functional unit of all living organisms
Define “Tissue”
A group of cells with a common structure and function
Define “Organ”
Composed of tissues functioning together for a specific task
Define “Organ System”
Several organs working together
Define “Organism”
An individual; complex individuals contain organ systems
Define “Species”
A group of similar, interbreeding organisms
Define “Population”
Organism of the same species in a particular area
Define “Community”
Interacting populations in a particular area
Define “Ecosystem”
A community plus the physical environment
Define “Biosphere”
Regions of the Earth’s crust, waters, and atmosphere inhabited by living organisms
Define “Taxonomy”
The discipline of identifying and grouping organisms according to certain rules (Domain, Kingdom, Phylum, Class, Order, Species)
What are the 5 domains?
Archaea
Bacteria
Eukarya
Prokaryotes
Eukaryotes