BIOLOGY 242 Midterm: Lab 14

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Advantages of capsule/slime layer: resistance to phagocytosis, protection against desiccation, exclusion of viruses, resistance to toxic chemicals, and attachment to surfaces. Questions: des(cid:272)ri(cid:271)e the theory of ma(cid:374)eval"s stai(cid:374)i(cid:374)g pro(cid:272)edure. Congo red is an acidic stain and will be repelled and the slide will be red and the. Mo u(cid:374)stai(cid:374)ed (cid:894)(cid:374)egative stai(cid:374)(cid:895) the ma(cid:374)eval"s is a positive stai(cid:374) (cid:271)e(cid:272)ause: list 4 functions of the glycocalyx: Attachment, protection from attachment of viruses, protection from drying out, protection from toxic chemicals: propose some environmental factors that may favor capsule formation. If in a human body: due to presence of macrophages and viral infections (lungs)