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Why and how do cells communicate? 1. Give several examples of communication between single-celled organisms. 2. Indicate what is meant by the "quorum-sensing" gene in bacteria and how this may have applications in medicine (see reading assignment). 3. Distinguish between the following types of cell communication in multi-celled organisms relative to distance the signal must travel and use of signal receptors: direct intracellular signaling contact-dependent signaling paracrine signaling endocrine signaling
