Lecture 1_F07

Lecture 1_F07 - Welcome to BIOLOGY 51 ! Instructor: Kirk...

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Unformatted text preview: Welcome to BIOLOGY 51 ! Instructor: Kirk Land Contact information: KLAND@pacific.edu Office: CR202 100 m 0.5 m 4 m Bacteria are the most diverse and widespread prokaryotes and are now divided among multiple kingdoms. Each of the rod-shaped structures in this photo is a bacterial cell. Protists (multiple kingdoms) are unicellular eukaryotes and their relatively simple multicellular relatives.Pictured here is an assortment of protists inhabiting pond water. Scientists are currently debating how to split the protists into several kingdoms that better represent evolution and diversity. Kingdom Plantae consists of multicellula eukaryotes that carry out photosynthesis, the conversion of light energy to food. Many of the prokaryotes known as archaea live in Earths extreme environments, such as salty lakes and boiling hot springs. Domain Archaea includes multiple kingdoms. The photo shows a colony composed of many cells. Kindom Fungi is defined in part by the nutritional mode of its members, such as this mushroom, which absorb nutrientsafter decomposing organic material. Kindom Animalia consists of multicellular eukaryotes that ingest other organisms. DOMAIN ARCHAEA Introduction Overview: This is a great time to be studying biology! Biology: basically the scientific study of life OBSERVATIONS : Some properties of life Figure 1.2 (c) Response to the environment (a) Order (d) Regulation (g) Reproduction (f) Growth and development (b) Evolutionary adaptation (e) Energy processing A Hierarchy of Biological Organization The hierarchy of life Extends through many levels of biological organization From the biosphere to organisms Figure 1.3 1 The biosphere From cells to molecules Cell 8 Cells 6 Organs and organ systems 7 Tissues 10 Molecules 9 Organelles 50 m 10 m 1 m Atoms Figure 1.3 Grouping Species: The Basic Idea Taxonomy Is the branch of biology that names and classifies species according to a system of broader and broader groups Classifying life Species Genus Family Order Class Phylum Kingdom Domain Mammalia Ursus ameri- canus (American black bear) Ursus Ursidae Carnivora Chordata Animalia Eukarya Figure 1.14 The Three Domains of Life At the highest level, life is classified into three domains Bacteria Archaea Eukarya Domain Bacteria and domain Archaea Consist of prokaryotes Domain Eukarya, the eukaryotes Includes the various protist kingdoms and the kingdoms Plantae, Fungi, and Animalia Lifes three domains Figure 1.15 100 m 0.5 m 4 m Bacteria are the most diverse and widespread prokaryotes and are now divided among multiple kingdoms. Each of the rod-shaped structures in this photo is a bacterial cell....
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Lecture 1_F07 - Welcome to BIOLOGY 51 ! Instructor: Kirk...

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