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1.3 Studying Life. Biology = the study of life Bios = life | ology = study of. 8 Characteristics. 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). - PowerPoint PPT Presentation
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1.3 Studying LifeBiology = the study of life
Bios = life | ology = study of
8 Characteristics
1.The cell - the smallest unit of lifeUnicellular = 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 DevelopmentGrowth = getting largerDevelopment = changing shape and structureDifferentiation = cells look different and perform different functions
5. Use EnergyMetabolism = chemical reactions in the body
Animals eat to obtain energy
Plants photosynthesize
6. Response to environmentStimulus = a signal
Response = a reaction
7. Internal BalanceHomeostasis – maintaining constant internal conditions (sameness)
8. Evolution - species change over time
Branches of Biology
Zoology = animalsPaleontology = ancient lifeCytology = cellsBotany = plantsEntomology = insects
You guess…Microbiology =Ecology = Anthropology =
Levels of Organization
MoleculeCellTissueOrganOrgan SystemsOrganismsPopulationCommunityEcosystemBiosphere
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.