Be familiar with the common characteristics of animals.
Answer- - Multicellular heterotrophs
- cells lack cell walls
-most have nerves, muscles, and capacity to move at some point in the life cycle
- able to reproduce sexually
- specialized sensory structures and nervous system
- cells exist...
BIO 182 E xam 4 NAU Questions and Correct Answers Be familiar with the common characteristics of animals. Answer - - Multicellular heterotrophs - cells lack cell walls -most have nerves, muscles, and capacity to move at some point in the life cycle - able to reproduce sexually - specialized sensory structures and nervous system - cells exist in extensive extracellular matrix - unique cell junctions What type of life cycle do all animals show? Answer - gametic What is the most likely ancestor of animals? Answer - choanoflagellates What are the 3 major features that were traditionally used to classify animals? Know the different variations on these 3 major features. Answer - 1. Tissues - metazoa - parazoa - porifera (sponges) - eumetazoa 2. Body Symmetry - radial symmetry - bilateral symmetry 3. Specific features of embryonic development - protosome - deutrosome Be able to draw/identify the phylogenetic tree based off those three major features. Answer - See chapter 26 phylogeny tree What are the features of protostome and deuterostome development? Answer - Protostome: - spiral cleavage - cleavage is determinate - blastopore becomes mouth Deutrostome: - radial cleavage - cleavage in indeterminate - blastopore becomes anus What is the focused gene for molecular analysis used in animal diversity? Answer - Compare similarities between DNA and ribosomal RNA of animals Sometimes focus on small subunit ribosomal RNA
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