Bell Work In a t-chart, list characteristics that a plant, a puppy, a house, and a cup of water have in common, as well as ways that they are different. differentsimilar

What did you come up with?

Cell Overview (Before we jump into genetics)

All four respond to their environment A house has a thermostat The cup of water can freeze or vaporize A puppy can grow, develop, reproduce, find shelter A plant can grow, develop, and reproduce

Discuss: What are ways humans respond to the environment? Put on a jacket Find shelter Move to a warmer/colder climate Build things to aid our survival Wells and filters (clean water) Electricity (heat/cold) Agriculture (food)

Living things have four characteristics 1.Organization (of functions and organs necessary for survival) 2.The ability to develop and grow 3.The ability to respond to the environment 4.The ability to reproduce

Discuss: What are some things that meet only one or a few of the characteristics of living things? Rock Responds to its environment Binder Provides organization and structure Chemicals and minerals Can develop and grow Respond to their environment Water Responds to its environment

All living things are made of cells Unicellular Made of a *single* cell Too small to see directly Carries out all activities of life Multicellular Made of many cells Organisms you can see (most of the time) Cells work together to carry out all activities of life

All living things are made of cells The cell is the smallest unit that performs the activities of life. Multicellular organisms have different types of cells working together. In a unicellular organism, a single cell carries out all the activities of life.

Unicellular organisms

Multicellular organisms

Red blood cells White blood cells Skin cells Muscle cells

Discuss with a partner Difference between unicellular and multicellular organisms Examples of unicellular organisms Examples of multicellular organisms

List types of unicellular and multicellular organisms you already know of E. Coli Salmonella Yeast Humans Dogs Birds Mushrooms Frogs Whales unicellularmulticellular

The Cell Theory All living organisms are composed of one or more cells The cell is the basic unit of structure and organization in organisms Cells arise from pre-existing cells

Cell: the smallest structural and functional unit of an organism

Exit Ticket: On a half sheet of paper, come up with an analogy for cells Ex: A word is like a cell. It has its own meaning and purpose like a unicellular organism. When hundreds and thousands of them are put together, they can form a book, like cells in a multicellular organism.