Chapter 1: Exploring Life



Chapter 32: Intro to Animal Diversity

32.1 Animals are multicellular, heterotrophic eukaryotes with tissues that develop from embryonic layers

• Nutritional Mode- heterotrophs,

• Cell Structure and Specialization- multicellular eukaryotes, lack cell walls, collagen, nervous tissue, muscle tissue

• Reproduction and Development- zygote, cleavage, blastula, gastrulation, embryonic tissue layers, gastrula, endoderm, ectoderm, blastocoel, blastopore, larva, metamorphosis, Hox genes

Concept Check- 1,2

32.2 The history of animals may span more than a billion years

• Neoproterozoic Era- Ediacaran fauna

• Paleozoic Era- Cambrian Explosion; hard, mineralized skeletons

• Mesozoic Era

• Cenozoic Era

Concept Check- 1,2

3. Animals can be characterized by “body plans”

• Intro- grade, body plan

• Symmetry- radial symmetry, bilateral symmetry, dorsal, ventral, anterior, posterior, cephalization

• Tissues- germ layers, ectoderm, endoderm, diploblastic animals, triploblastic animals, mesoderm

• Body Cavities- body cavity, coelom, pseudocoelom, acoelomates

Concept Check- none

Testing Your Knowledge 1, 2, 3, 4, 6, 9, 10

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