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| 9395133448 | Invertebrates | Animals without a backbone | 0 | |
| 9395133449 | Animals in the phylum Porifera | sponges | 1 | |
| 9395133450 | Sponges are | sedentary and live in marine waters or fresh water | 2 | |
| 9395133451 | Filter feeders | animals that capture food particles suspended in the water that passes through their body | 3 | |
| 9395133452 | The body cavity of a sponge | spongocoel |  | 4 |
| 9395133453 | Opening at the top of sponges | Osculum | 5 | |
| 9395133454 | Choanocytes | Flagellated collar cells that generate water current through the sponge and ingest suspended food |  | 6 |
| 9395133455 | Mesohyl | A gelatinous noncellular layer between two cell layers |  | 7 |
| 9395133456 | Amoebocytes | found in the mesohyl and play roles in digestion and structure |  | 8 |
| 9395133457 | Hermaphrodites | each individual functions as both male and female | 9 | |
| 9395133458 | Examples of cnidarians | Jellies, corals, and hydras | 10 | |
| 9395133459 | Gastrovascular cavity | single opening that functions as a mouth and an anus | 11 | |
| 9395133460 | Two variations of the body plan of cnidarians | polyp and medusa | 12 | |
| 9395133461 | Polyp | Hydra, sessile on the aboral end. |  | 13 |
| 9395133462 | Medusa | Jellies, bell shaped bodies with a mouth on the underside |  | 14 |
| 9395133463 | Cnidocyte | unique cells that function in defense and capture of prey |  | 15 |
| 9395133464 | Nematocysts | specialized organelles within cnidocytes that eject a stinging thread | 16 | |
| 9395133465 | Medusozoans | All cnidarians that produce a medusa | 17 | |
| 9395133466 | Hydras reproduce by | budding | 18 | |
| 9395133467 | Corals often form symbioses with algae and secrete a hard | exoskeleton | 19 | |
| 9395133468 | the clade bilateria contains (3) | Lophotrocozoa, ecdysozoa, and deuterostomia | 20 | |
| 9395133469 | What regulates the osmotic balance in flatworms | protnephridia | 21 | |
| 9395133470 | What are the best-known rabditphorans | planarians | 22 | |
| 9395133526 | Planarian anatomy |  | 23 | |
| 9395133471 | Two different types of rhabditophorans | trematodes and tapeworms | 24 | |
| 9395133472 | trematodes | parasite that spend most of their life in snails. they have alternating sexual and asexual stages | 25 | |
| 9395133473 | tapeworms | parasites of vertebrates that lack a digestive system. absorb nutrients from the host's intestine | 26 | |
| 9395133474 | the tapeworms units that contain sex organs | proglottids | 27 | |
| 9395133475 | Rotifers | tiny animals that inhabit fresh water, the ocean, and damp soil |  | 28 |
| 9395133476 | A digestive tube with a separate mouth and anus that lies within a fluid filled pseudocoelom | Alimnetary canal | 29 | |
| 9395133477 | The process where females produce offspring from unfertilized eggs | parthenogenesis | 30 | |
| 9395133478 | Sessile colonial animals that superficially resemble plants | ectoprocts | 31 | |
| 9395133479 | Animals that superficially resemble clams and molluscs | Brachiopods | 32 | |
| 9395133480 | Phylum mollusca contains what animals | Snails, slugs, oysters, clams, octopuses, and squids. | 33 | |
| 9395133481 | What are the three main body parts of molluscs | Muscular foot, visceral mass, and a mantle | 34 | |
| 9395133482 | Many molluscs have two other body parts | Mantle cavity and radula | 35 | |
| 9395133483 | The gonads of molluscs are located where | visceral mass | 36 | |
| 9395133484 | Four major classes of molluscs | Polyplacophora, gastropoda, bivalvia, and cephalopoda. | 37 | |
| 9395133485 | Chitons | oval shaped marine animals encased in armor |  | 38 |
| 9395133486 | Gastropods | Mostly snails and slugs, have a spiraled shell, and are herbivores. |  | 39 |
| 9395133487 | Clams mussels and scallops are | Bivalves |  | 40 |
| 9395133488 | Carnivores with beaklike jaws surrounded by tentacles | cephalopods |  | 41 |
| 9395133489 | Coelomates with bodies composed of a series of fused rings | Annelids |  | 42 |
| 9395133490 | Mobile, marine organisms that have parapodia on each body segment | errantians |  | 43 |
| 9395133491 | Clade that contains leeches and earthworms. Usually less mobile than errantians | Sedentarians |  | 44 |
| 9395133492 | Predators of invertebrates and parasites that suck blood | leeches | 45 | |
| 9395133493 | Tough coat that ecdysozoans are covered by | cuticle | 46 | |
| 9395133494 | The cuticle is then molted in a process called | ecdysis | 47 | |
| 9395133495 | Animals found in most aquatic habitats, in the soil, in moist tissues of plants. | Nematodes | 48 | |
| 9395133496 | Body plan of arthropod | segmented body, hard exoskeleton, jointed appendages | 49 | |
| 9395133497 | Appendages of arthropods are modified for | walking, feeding, sensory reception, reproduction, and defense. | 50 | |
| 9395133498 | Open circulatory system | hemolymph is circulated into the spaces surrounding the tissues and organs | 51 | |
| 9395133499 | 3 lineages of arthropods | Chellicerates, myriapods, and pancrustaceans. | 52 | |
| 9395133500 | Cellicerates | sea spiders, horseshoe crabs, scorpions, ticks, mites, and spiders | 53 | |
| 9395133501 | myriapods | centipedes and millipedes |  | 54 |
| 9395133502 | pancrustaceans | lobsters and other crustaceans, as well as insects and their relatives |  | 55 |
| 9395133503 | Feeding apendages of cellicerata | chellicerae | 56 | |
| 9395133504 | Arachnids | spiders, scorpions, ticks, and mites |  | 57 |
| 9395133505 | Gas exchange in spiders occurs where | book lungs | 58 | |
| 9395133506 | All millipedes and centipedes belong to the clade | myriapoda | 59 | |
| 9395133507 | Millipedes are herbivores but centipedes are | carnivores | 60 | |
| 9395133508 | Crustaceans | Sea animals with highly specialized appendages. smaller ones have cuticles larger ones have gills |  | 61 |
| 9395133509 | Shelled cephalopods are called | ammonites |  | 62 |
| 9395133510 | Insects | Animals that live in almost every terrestrial habitat and fresh water. | 63 | |
| 9395133511 | The process where young insects resemble adults but go through a series of molts until they reach full size | incomplete metamorphosis | 64 | |
| 9395133512 | Insects that have larval stages known by such names such as maggot, grub, or caterpillar undergo what | complete metamorphosis | 65 | |
| 9395133513 | insects have separate males and females and reproduce | sexually | 66 | |
| 9395133514 | Sea stars and sea urchins are what | echinoderms | 67 | |
| 9395133515 | The clade deuterostomia consists of what | echinoderms and chordates | 68 | |
| 9395133516 | deuterstomes share developmental characteristics, what are they | radial cleavage and formation of the anus from the blastopore | 69 | |
| 9395133517 | Echinoderms | slow moving or sessile marine animals |  | 70 |
| 9395133518 | A network of hydraulic canals branching to tube feet | water vascuclar system | 71 | |
| 9395133519 | Tube feet | the appendages that help echinoderms with locomotion and feeding |  | 72 |
| 9395133520 | Echinoderms are divided into 5 clades (AOECH) | Asteroidea, ophruoidea, echinoidea, crinoidea, holothuroidea | 73 | |
| 9395133521 | Asteroidea | sea stars and sea daises |  | 74 |
| 9395133522 | Ophiuroidea | Brittle stars |  | 75 |
| 9395133523 | Echinoidea | sea urchins and sand dollars |  | 76 |
| 9395133524 | Cninoidea | sea lillies and feather stars |  | 77 |
| 9395133525 | Holothuroidea | sea cucumbers |  | 78 |
