뒤로General Biology: Key Concepts from Campbell Biology Chapters 1-3
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Biology is the scientific study of life and living organisms.
Order, evolutionary adaptation, response to the environment, reproduction, growth and development, regulation, and energy processing.
The cell theory states that all living things are made of cells, and all cells come from preexisting cells.
Prokaryotic cells lack a nucleus and membrane-bound organelles; eukaryotic cells have both.
DNA stores genetic information that directs the development and functioning of organisms.
Information flows from DNA to RNA to protein.
Evolution is the process of change in populations over generations through natural selection.
A mechanism of evolution where individuals with favorable traits are more likely to survive and reproduce.
Atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystems, biosphere.
A property that arises at a higher level of organization that is not present at lower levels.
A hypothesis is a testable explanation; a theory is a well-supported broad explanation.
A process involving observation, hypothesis formation, experimentation, and conclusion.
All life shares common features but has diversified through evolution to adapt to different environments.
Ribosomes synthesize proteins by translating mRNA.
The maintenance of a stable internal environment despite external changes.
A community of living organisms interacting with their physical environment.
Energy is required for all biological processes and flows through ecosystems.
A segment of DNA that codes for a specific protein or RNA molecule.
Qualitative data describes qualities; quantitative data involves numerical measurements.
An experiment where only one variable is changed at a time to test its effect.