WHAT IS A CELL? Cells are the structural and functional units of all living organisms. Some organisms, such as bacteria and some protists, are unicellular,

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Today’s Objectives TSW distinguish between plant and animal cells and diagram them. TSW distinguish between prokaryotes and eukaryotes.

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WHAT IS A CELL? Cells are the structural and functional units of all living organisms. Some organisms, such as bacteria and some protists, are unicellular, consisting of a single cell. Other organisms, such as humans, are multicellular, or have many cells—an estimated 100,000,000,000,000 cells! Each cell is an amazing world unto itself: it can take in nutrients, convert these nutrients into energy, carry out specialized functions, and reproduce as necessary. Even more amazing is that each cell stores its own set of instructions for carrying out each of these activities. Prokaryotes = bacteria (primitive cells) Eukaryotes = animal, plant, fungi, protist cells

Cells vs. Viruses not cells

Cells Primitive cells = Complex cells = eubacteria, archaebacteria animals, plants, fungi, protists

Animal Cell Small vacuoles

Plant Cell

Fungal Cell hyphal cell wall cytoplasm

Protist Cells

sphere shaped - coccus rod shaped - bacillus Spiral shaped –spirochete or spirilla

Bacterial Cell

Eubacteria are the more common of the bacteria Archaebacteria live in extreme environments and include methanogens, the halophiles and the themoacidophiles.