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.