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Comparing LifeLiving things are both similar to and different from each other and from nonliving things.
Objective
1. Compare and contrast the parts of plants, animals, and one-celled organisms.
Cells
• Living things are composed of cells
Cells
Muscle Cells• Cells provide structure
and carry on major functions to sustain life.
Cells
Heart Muscle Cells• Cells provide structure
and carry on major functions to sustain life.
Cells
Red and White Blood Cells
• Cells provide structure and carry on major functions to sustain life.
Cells
• Cells are usually microscopic in size.
Cells
• cells function similarly in all living things
Strep bacteria
Onion plant
Chimpanzee
Cell Division
• Cells grow and divide, producing more cells.
E. Coli bacteria dividing
Cell Division
• Cells grow and divide, producing more cells.
Paramecium dividing
Cell Division
• Cells grow and divide, producing more cells.
Cell Division
Cells take in nutrients
• Cells use nutrients to • provide energy for the work that cells do
• to make the materials that a cell or an organism needs.
Photosynthesis
Cell Respiration
Cells take in nutrients
• to make the materials that a cell or an organism needs.
Photosynthesis
Cells take in nutrients
• to make the materials that a cell or an organism needs.
Photosynthesis
Cells take in nutrients• To provide energy for the work that cells do
Cell Respiration
Basic Cell Structure
• Most cells have cell membranes, genetic material, and cytoplasm.
Even bacteria!
bacterial chromosome
Structures Unique to Plant Cells
• Some cells have a cell wall and/or chloroplasts.
Elodea
Structures Unique to Plant Cells
• Some cells have a cell wall and/or chloroplasts.
Cell Wall
Chloroplast
The Nucleus
• Many cells have a nucleus.
Unicellular Organisms• Some organisms
are single cells
Amoeba
Unicellular Organisms• Some organisms
are single cells
Paramecium
Unicellular Organisms• Some organisms
are single cells
Euglena
Multicellular Organisms
• Some organisms are made up of many cells
Homo sapiens
Multicellular Organisms
• Some organisms are made up of many cells
Hydra
Multicellular Organisms
• Some organisms are made up of many cells
Oak Tree
Multicellular Organisms
• Some organisms are made up of many cells
Daphnia
Levels of Organization
• Cells are organized for more effective functioning in multicellular organisms.
Levels of Organization
.
Levels of Organization
OrganTissueCell Organ System
Plants
• Many plants have roots, stems, leaves, and reproductive structures.
Plants
• These organized groups of tissues are responsible for a plant’s life activities.
Multicellular Organism
• Animals have similar organs and specialized systems for carrying out major life activities.
Human Cardiovascular
System
Pig Cardiovascular
System
Digestive Systems
Classification
• Living things are classified by shared characteristics on the cellular and organism level.
Bacteria Cells with a Nucleus
Classification
• In classifying organisms, biologists consider details of internal and external structures.
Classification
• Biological classification systems are arranged from general (kingdom) to specific (species).
Classification
• Biological classification systems are arranged from general (kingdom) to specific (species).
Classification
• Biological classification systems are arranged from general (kingdom) to specific (species).
