Cells, Microscopes, and Domains of Life. Introduction Modern cell theory Different types of cells...

Cells, Microscopes, and Domains of Life

Introduction

• Modern cell theory

• Different types of cells– prokaryotic, eukaryotic

• Three cell components– cell membrane, genetic material, cytoplasm

• Five kingdoms

• Three domains

The hierarchy of biological order

Classifying life

The traditional 5-kingdom system

The three domains of life

The 5-kingdom system compared with alternative schemes of classification

Fig. 18-6 The Eukaryotic Tree of Life

The Compound Light Microscope

• Prepared “letter e”

• NEVER USE COARSE ADJUSTMENT ON HIGH POWER!

Microscopic Measurement (p.72)

• Field of View

• Diameter

• Table 1. Diameter of field of view with three different objective lenses

Comparing Cells

• Domain Eukarya, Kingdom Protista

• Domain Eukarya, Kingdom Plantae

• Domain Eukarya, Kingdom Fungi

• Domain Eukarya, Kingdom Animalia

• Domain Bacteria

A Prokaryotic Cell

Diversity of Bacterial Forms

Coccus Bacillus Spirillus

Euglena

Protista:

Fig. 20-3. Rhizopus (bread mold) life cycle

Fungi:

Fig. 6-4 A Generalized Animal CellAnimalia:

Fig. 6-5. A Generalized Plant CellPlantae:

Putting Away the Microscope

• Remove the slide and return it to its proper place

• Turn down the rheostat to “3” or lower

• Turn off the illuminator switch.

• Revolve the nosepiece so the 4X objective is in place.

• Cover the microscope with its cover.

Any Questions?