APBio_Unit 2 Cell Structure Lab(1).docx - Name Charlie van...

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Name : Charlie van der Valk Da t e : Investigation: Exploring Different Types of Cells All living organisms are made of cells. The smallest cells are about 0.001 millimeters in diameter and belong to one of two domains: Bacteria and Archaea . Organisms in these groups do not have a nucleus or membrane-bound organelles. These organisms were some of the first to live on the planet; archaea lived over 3.5 billion years ago. Organisms can belong to a third domain: Eukarya . Eukaryotic cells are larger (0.01 to 1 mm) and contain a nucleus and organelles, such as mitochondria and endoplasmic reticulum. Plants, animals, fungi and protists belong to this domain. In this investigation, you will view both preserved specimens and living specimens from the domain Eukarya and the domain Bacteria. Exercise 1: Getting to Know the Domain Bacteria Bacteria cells are very small compared to eukaryotic cells. They are visible with a light microscope using the high power objective. Bacteria come in four shapes: cocci (round), spiral, and bacillus (rod-shaped).

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