Lecture 15 - Lecture 15 1 How do we go from a simple...

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Lecture 15 1) How do we go from a simple eukaryote to a complex mouse? a) Heterotrophic – Consuming other organisms, helpful to have muscles and nerve cells and specialization, etc. b) Mouse is made up of billions of cells with specialized function. c) Advantages of multicellularity: Increased Specialization with Sensory Function or Feeding Apparatus, Can Accommodate Individual Cell Death, Bigger and Multicellular you can ingest more animals and puts you higher on the food chain, Size can also provide protection from other predators that can’t eat you, and also increases motility (easier to get around, disperse to new habitats). d) Challenges of Multicellularity: If you are bigger, you have to eat more to stay alive and have energy, Need communication between cells and coordination of function, Decreased surface to volume ratio – it is hard to get cells into the interior of an organism and to get waste out (need circulatory and digestive), Multicellular needs a program of development
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