Bio 204 Exam 3 Review
1. What are the characteristics of all animals?: Multicellular, heterotrophic, eukaryotic, lack cell
walls, ingest their food, have tissues, body symmetry, embryonic germ layer, coelom (triploblastic), categorized as
protostomes or deuterostomes
2. What are groups of animal cells held together by?: Held together by extracellular matrix of
proteins, the most abundant being collagen
3. What are tissues?: groups of similar cells that act as a functional unit
4. Advantages of Multicellularity: - Division of labor
- Allows more eflcient respiration (better surface-to-volume ratio for gas exchange)
- Animals can grow larger
- Damaged cells can be repaired (rather than die)
5. Life history of animals: -most use SEXUAL REPORODUCTION, diploid stage dominates the life cycle
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1. What are the characteristics of all animals?: Multicellular, heterotrophic, eukaryotic, lack cell
walls, ingest their food, have tissues, body symmetry, embryonic germ layer, coelom (triploblastic), categorized as
protostomes or deuterostomes
2. What are groups of animal cells held together by?: Held together by extracellular matrix of
proteins, the most abundant being collagen
3. What are tissues?: groups of similar cells that act as a functional unit
4. Advantages of Multicellularity: - Division of labor
- Allows more eflcient respiration (better surface-to-volume ratio for gas exchange)
- Animals can grow larger
- Damaged cells can be repaired (rather than die)
5. Life history of animals: -most use SEXUAL REPORODUCTION, diploid stage dominates the life cycle
1/2
