BIOL 1202 : Exam 2 Test Materials

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15 Mar 2019
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Panthera: example: panthera is the genus; pandus is a specific epithet that refers to one species of the genus. Panthera: linnaeus convinced us to use a hierarchical classification system. Shared derived characters (unique to a clade: the sequence of branching in a cladogram then represents the sequence in which evolutionary novelties (shared derived characters) evolved. Non-organisms (viruses): viruses- small (0. 05 to 0. 2 micrometers) and come in many different shapes, 3 common parts, genome- genetic information (can be either single stranded or double stranded dna or. Defense against disease: the immune system: three lines of defense against microbial attack, innate defenses, nonspecific external barriers (skin, mucous membranes) Skin: physical barrier to microbial entry, inhospitable environment for growth; dry, dead cells on the surface. Sweat/sebaceous glands secreting acids and natural antibiotics like lactic acid: mucous membranes of respiratory and digestive tracts well defined. Secretions have antibacterial enzyme: nonspecific internal defenses.

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