1 3 Studying Life Biology the study of
1. 3 Studying Life Biology = the study of life Bios = life | ology = study of
8 Characteristics 1. The cell - the smallest unit of life Unicellular = 1 celled Multicellular =many celled
2. Reproduction Sexual = DNA from 2 different parents Asexual = single parent (cloning, budding)
3. Genetic Code – directions for inheritance (DNA)
4. Growth and Development Growth = getting larger Development = changing shape and structure Differentiation = cells look different and perform different functions
5. Use Energy Metabolism = chemical reactions in the body Animals eat to obtain energy Plants photosynthesize
6. Response to environment Stimulus = a signal Response = a reaction
7. Internal Balance Homeostasis – maintaining constant internal conditions (sameness) 8. Evolution - species change over time
Branches of Biology Zoology = animals Paleontology = ancient life Cytology = cells Botany = plants Entomology = insects You guess… Microbiology = Ecology = Anthropology =
Levels of Organization Molecule Cell Tissue Organ Systems Organisms Population Community Ecosystem Biosphere
CHECK FOR UNDERSTANDING 1. There are _____ characteristics of life 2. The smallest unit of life is the ______ 3. All living things must be able to __________, or to make more of their own kind. 4. All living things have a ___________, which are like instructions for building the body 5. During development, some cells become liver cells, some become skin cells and some become muscle cells. This process is called ____________ 6. Animals get their ________ by consuming food. Plants get it by _________________ 7. _____________ is the maintaining of an internal balance, or sameness 8. ___________ is the process where species change over time.
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