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Download Unifying Themes in Biology Represent recurring patterns
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Unifying Themes In Biology Recurring patterns/ideas that are found throughout the study of living systems 1. Cell Structure & Function • • Same basic structure in unicellular or multicellular organisms Slight differences are found when a cell differentiates (specializes) to perform a specific function 2. Stability & Homeostasis • • • Maintaining internal conditions Temp., hormone levels, heart rate, blood sugar, sodium content, water levels, etc. Even unicellular organisms must do this 3. Reproduction & Inheritance • • • Genetic instructions(DNA) must be passed on to all cells Asexual reproduction takes place in unicellular organisms, makes exact copies Sexual reproduction takes place in multicellular organisms, adds genetic variability Unifying Themes In Biology 4. Evolution Populations change over (many) generations Natural selection means that the type of environment a population is in determines which traits are advantageous 5. Interdependence of Organisms All organisms in an ecosystem depend on one another for survival 6. Matter, Energy & Organization Living things are highly organized Different structures have evolved to carry out different functions An enormous amount of energy is needed to maintain structure Energy is continuously recycled between the organisms & their environment Characteristics of Life Cells Organization Energy use Homeostasis Growth Cell division (mitosis) Cell growth Differentiation Development- growth & change through a life cycle Reproduction Essential for continuation of species