BIO 180 Lecture 11:02

Archae and bacteria fundamentally different in key

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Unformatted text preview: ? archae and bacteria * Fundamentally different in key structural, biochemical, physiological traits. - External cell wall bacteria include peptidoglycan - Plasma membrane archae unique phospholipids (contain isoprene) - DNA archae associated with histones - DNA/RNA polymerases, ribosomes etc. distinct in bacteria How Do They Stack Up Compared With Other Forms of Life? Age - bacteria = earliest organisms - around/successful > 3.5 billion years - Eukaryotes & Archae appear ~ 1.75 billion years ago. Abundance - dominant life forms on planet in terms of total volume & biomass. Diversity - 10s of millions species exist. - virtually all unnamed & undescribed. Range - most widespread organisms; found almost everywhere. the metabolic diversity allow them to be - Some “extremophiles” extremophiles Morphological Diversity in Bacteria - Shapes: filaments, spheres, rods, chains, spirals. - Movement: some glide or swim with long tail(s) – Flagella - Cell wall composition: Metabolic Diversity * Maste...
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This note was uploaded on 02/24/2014 for the course BIOL 180 taught by Professor Freeman during the Winter '07 term at University of Washington.

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