Exam 3: BIO322 / BIO 322 (Latest Update)
Exam | Questions and Verified Answers | 100% Correct |
Grade A - GCU
Levels of Animal Organization - ANSWERkingdom, phylum, class, order, family, genus,
species
Taxonomy - ANSWERscience of classification
Systematics - ANSWERstudy of the diversity of life and the evolutionary relationships
between organisms
Example of Taxonomy (Spider) - ANSWERKingdom- Animalia
Phylum- Arthropoda
Class- Arachnida
Order- Araneae
Family- Araneidae
Genus- Argiope
Species- argentata
Common name for spider - ANSWERGolden orb-web weaver
Families always end with... - ANSWER"dae"
Order always ends with... - ANSWER"eae"
Cellular Level - ANSWER-everything composed in one cell
Tissue Level - ANSWER-groups of similar cells that have a common function
Organ Level - ANSWER-contains two or more types of tissues
Cellular Level Example - ANSWER-protozoans
-phylum Porifera (sponges)
Tissue Level Example - ANSWER-phylum Cnidaria (sea anemones, jellyfish)
Organ Level Example - ANSWER-phylum Platyhelminthes (flatworms, planaria)
3 Levels of Symmetry - ANSWER1) No Symmetry (asymmetrical)
2) Circular Symmetry (pie-shape)
3) Bilateral Symmetry (symmetrical)
, No Symmetry Example - ANSWERSponge
Radial Symmetry Example - ANSWERCoral polyp
Bilateral Symmetry Example - ANSWERPlatyhelminthes
Which organism was the first to exhibit bilateral symmetry? - ANSWERPlanaria (phylum
Platyhelminthes)
What level of organization is phylum Porifera? - ANSWERcellular
What level of symmetry is phylum Porifera? - ANSWERno symmetry (asymmetrical)
Totipotent - ANSWERcells can change shape and function
Choanocytes - ANSWERflagellated collar cells, generate a water current through the
sponge and ingest suspended food
Sessile - ANSWERAn organism that does not move. It remains attached to one place
Adult sponges are... - ANSWERsessile
Mesohyl - ANSWERa gelatinous region between the two layers of cells of a sponge
Spicules - ANSWERsmall, spike shaped particles of calcium carbonate or silicon
dioxide that make up the skeleton of some sponges
What are household sponges typically composed of? - ANSWERspongin
Spongin - ANSWERCollagen-like material that make up the skeleton of some sponges.
Amphiblastula - ANSWERFree-swimming larval stage of sponge
How do sponges feed? - ANSWER-as water enters the sponge through pores, food is
collected and water comes out of osculum
-food sticks to choanocyte cell or is collected on the mucus-producing outer collar
-food is distributed through phagocytosis
Osculum - ANSWERA large opening on a sponge through which filtered water is
expelled
Amoebocytes - ANSWERFound in sponges, these cells are mobile and perform
numerous functions, including reproduction, transport of food particles to nonfeeding
cells, and secretion of material that forms the spicules
Amoebocytes are... - ANSWERtotipotent
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