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Cells. Engage. Human Epidermis . Staphylococcus epidermis. Cardiac (heart) Muscle . Plant Stems. Leaves. Amoeba proteus. Root tip. What are some similarities and differences that you observed by looking at a variety of cells?. Explain: Cells. The Cell Theory.
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What are some similarities and differences that you observed by looking at a variety of cells?
The Cell Theory • All living things are composed of cells. • Cells are the basic units of structure and function in living things. • New cells are produced from existing cells.
Types of Cells • Two kinds of cells depending on whether they have a nucleus Eukaryote Prokaryote Genetic material
Prokaryotes • Genetic material (DNA) is notcontained in a nucleus • Usually small and simple
Prokaryotes The ONLY prokaryotes in the world are BACTERIA.
Eukaryotes • Usually larger and more complex than prokaryotes. • May be unicellular like an amoeba or multicellular like a plant
Eukaryotes • Contain dozens of specialized structures called organelles. • Includes protists, fungi, plants and animals.
Eukaryotic cell structure • Two major parts: • Nucleus • Cytoplasm-portion of the cell outside the nucleus
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