Chapter 32 & 33
Kingdom Animilia
- Over 1.5 million species
- Estimated 73 million
- 35 Phylums
- Over half are insects
- More similarities within animal genomes than other kingdoms
Characteristics
- Multicellular
- Lack of cell wall
- Sexual reproduction
- mobile sperm
- larger non-motile egg
- Nervous Tissue
- Complexity
- Responsiveness
- Hox Genes
- Special clusters of genes associated with the planning of the body
Metazoans
- All animals
- Multicellular animals
- Paratoans
- Sponges
- Eumetazoans
- "true" multicellular animals
Classification/Systematics
- Old
- Morphology
- Embryotic Development
- Recent
- Molecular genetics
Body Plans
Morphological and Developmental Features
- Body Symmetry
- Number of tissue Layers
- Patterns of Embryonic development
Symmetry