Animal Diversity I

Question 1

Kingdom Animalia

Answer 1

eukarya (domain), multicellular body formed of eukaryotic cells (lack cell walls and plastids), heterotrophic nutrition, all organisms today are invertebrates (do not have a backbone)

Question 2

What is the criteria/characteristics for classification of an organism?

Answer 2

symmetry, level of organization, embryonic tissues, body plan, body cavity, fate of blastopore, and segmentation

Question 3

Phylum Porifera:

Answer 3

primitive, multicellular organisms, freshwater and marine, filter feed, use collar cells, body perforated with pores, spicules (helps classify them and helps form sponge skeleton)

Question 4

Phylum Cnidaria:

Answer 4

jellyfish, sea anemones, corals, only aquatic, unsegmented, polyp (asexual reproductive generation), medusa (sexual reproductive generation), no centralized nervous system, no complex organs, stinging cells

Question 5

Phylum Platyhelminthes:

Answer 5

flatworms, unsegmented, found in creeks and streams, also marine, free-living parasitic (planarians and tapeworms), hermaphroditic (both female and male sex organs)

Question 6

Phylum Mollusca:

Answer 6

primarily aquatic, muscular foot, visceral mass, and mantle, shelled, 3 main classes (Bivalvia, Cephalopoda, Gastropoda)

Question 7

Phylum Annelida:

Answer 7

earthworms, clamworms, and leeches, segmented worms (specialization of parts), aquatic or terrestrial habitats, complete digestive tract, clitellum (glandular structure used during reproduction)