Name Date Class _ .. .. _- CHAPTER 33 INTRODUCTION TO ANIMAL DIVERSITY LO 1 Dese
ID: 96698 • Letter: N
Question
Name Date Class _ .. .. _- CHAPTER 33 INTRODUCTION TO ANIMAL DIVERSITY LO 1 Deseribe characteristics of animals. P 637 I. An animal cell type is (prokaryotic eukarypt 2. An animal is (autotrophie heterotrophik by absorpt 3. An animal is (unlcellalarcolonial mlticellular- 4. Am animal cell (has does not havel cell wall by absorption ( heterotrophie by ingestion) false Animals are motile at least during some part of their life cycle. false All animals except for sponges have muscle cells that cause movement by contracting 5. True ree/ false All animals except for sponges have nerve cells that transmit electrical signals All animals except for 6. TreI/false . Truc LO 2 Identify evidence used to study animal evolution. P 637- 638 Key: fossils, comparative morphology, comparative genomies: are any physical trace of an organism that existed in the past such as fossilized bones. 2. provides info about which morphological traits are common among animal groups&which; are unique to individual lineages. Examples: Body plans common among animal groups& which are unique to indi 3. provides information about the relative similarity of genes or whole genomes of diverse organisms Categorize the evidence. A. fossils B. comparative morphology C. comparative genomics DNA such as Hox genes ribosomal RNA embryos anatomical body plan of an carthworm fern leaf imprint in an ancient rock dinosaur leg bone LO 3. Explain traits that show that choanonagellates are the closest thing relatives to animal. A 63·640 Choanoflagellates are the closest living relatives to (plants /animals / fung). Choanoflagellates are ( colonial multicelluar) (Protists Animals). Sponges are (colonial /multicellular) (Protists/Animals). Sponges do share key traits with choanoflagellates: I. Sessile life which means that adults live (swimming freely /attached permanently to a substrate Choanocytes cells with flagella that are used for ingesting them. / feeding) by trapping food particles and 2. (swimming Animals are a (monophyletic /paraphyletic) group that all share a common ancestor All animals are ( unicellular colonial / multicellulular.) Sponges are the most primitive of animals yet they share many developmental genes with other animals. Describe an hypothesis for the evolution of animals from colonial heterotrophic protists Digesive cavity Reproductive cells Colontal protist. Hollow sphere Beginning ofcell o Infolding an agsaregate Gastrula-dike of unspecial- ized cells specialization of identical cells Number in order the following steps: hollow sphere of unspecialized cells (blastula) gastrula-like proto animal infolding of blastula to form the gastrula beginning of cell specialization (eg: reproductive cells) in blastula colonial protist an aggregate of identical cellsExplanation / Answer
LO 2
1. Fossil
2. comparative morphology
3. comparative genomics
A. Fossil: fern leaf imprint, dinosaur leg bone
B. Comparative morphology: anatomical body plan of an earthworm, embryo
C. Comparative genomics: DNA such as Hox genes, ribosomal RNA
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