L9 Handout - Lab 8 - Invertebrates I

L9 Handout - Lab 8 - Invertebrates I - Bio 1A Lab Lecture...

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Bio 1A Lab Lecture Outline # 8 Invertebrate I Oct. 27 th , 2008 I. Overview: general themes A. Taxonomic classification: D > K > P > C > O > F > G > S . Human constructs ! # tissues, germ layers, symmetry, development, juvenile stages, etc. B. Cell and organismal needs. C. Cell size: Surface area sphere (4 ! r 2 ) versus cell volume (4/3 ! r 3 ) & diffusional times. Radius (r) 1 μ m 2 μ m 10 μ m 1,000 μ m Surface Area μ m 2 (A) 1.3 X 10 1 5.0 X 10 1 1.3 X 10 3 1.3 X 10 7 Volume μ m 3 (V) 4.2 X 10 0 3.4 X 10 1 4.2 X 10 3 4.2 X 10 9 A/V 3 1.5 0.29 2.8 X 10 -3 Time for Glucose diffusion* 1 ms 4 ms 9 ms 1 X 10 6 ms D. Cellular organization: -> cells - > tissues -> organs - > organ systems E. Many possible solutions to similar problems—must have the genetic endowment! F. Think of approaches to problems, environmental constraints, etc. G. Animal life cycle = fertilization, cell division and cell differentiation (hierarchical order) II. Terminology Review A. Axis (one line) versus a plane (two axes forms a sheet)! B. Difficult terms/concepts: i) cephalization ii) metamerism iii) closed vs. open circulatory system iv) asexual vs sexual (monoecious vs. dioecious)
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