BIO 182 Exam 4 NAU, BIO182 Final
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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
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,- 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:
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, - 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
What are the 2 new invertebrate clades that resulted from molecular analysis of the
rRNA region of the genome? - ANSWER-Ecdysozoa:
- named for ecdysis (molting)
- nematodes, arthropods, and a few other minor phyla
Lophotrochozoa:
- named for the lophophore (feeding tentacles) and trochophore larva
- mollusks, annelids, and several other phyla
For this chapter, you should know each of the phylum names (13 total phyla) that
are the end points of the phylogenetic tree of invertebrates. You should also be
able to be able to draw the tree and know the major traits that divide the clades on
the tree. - ANSWER-1. Phylum Porifera
2. Phylum Cnidaria
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NAU 2025 Questions and Answers 100%
Pass
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
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,- 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:
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
, - 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
What are the 2 new invertebrate clades that resulted from molecular analysis of the
rRNA region of the genome? - ANSWER-Ecdysozoa:
- named for ecdysis (molting)
- nematodes, arthropods, and a few other minor phyla
Lophotrochozoa:
- named for the lophophore (feeding tentacles) and trochophore larva
- mollusks, annelids, and several other phyla
For this chapter, you should know each of the phylum names (13 total phyla) that
are the end points of the phylogenetic tree of invertebrates. You should also be
able to be able to draw the tree and know the major traits that divide the clades on
the tree. - ANSWER-1. Phylum Porifera
2. Phylum Cnidaria
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