Campbell biology chapter 33 Exam A+ Pass Verified

Campbell biology chapter 33 Exam A+ Pass Verified Invertebrates - Answer- Animals without a backbone Animals in the phylum Porifera - Answer- sponges Sponges are - Answer- sedentary and live in marine waters or fresh water Filter feeders are - Answer- animals that capture food particles suspended in the water that passes through their body The body cavity that sponges have - Answer- spongocoel Opening at the top of sponges - Answer- Osculum Choanocytes - Answer- Flagellated collar cells that generate water current through the sponge and ingest suspended food Mesohyl - Answer- A gelatinous noncellular layer between two cell layers Amoebocytes - Answer- found in the mesohyl and play roles in digestion and structure Hermaphrodites - Answer- each individual functions as both male and female Examples of cnidarians - Answer- Jellies, corals, and hydras Body plan of cnidarians - Answer- gastrovascular cavity Gastrovascular cavity - Answer- single opening that functions as a mouth and an anus Two variations of the body plan - Answer- polyp and medusa Polyp - Answer- Hydra, sessile on the aboral end. Medusa - Answer- Jellies, bell shaped bodies with a mouth on the underside Cnidarians are carnivores that use what to capture prey - Answer- tentacles Cnidocyte - Answer- unique cells that function in defense and capture of prey Nematocysts - Answer- specialized organelles within cnidocytes that eject a stinging thread Medusozoans - Answer- All cnidarians that produce a medusa Examples of Medsozoans - Answer- Scyphozoans(jellies), Cubozoans(box jellies), and hydrozoans Hydras reproduce by - Answer- budding Anothozoans only occur as - Answer- polyps Corals often form symbioses with algae and secrete a hard - Answer- exoskeleton the clade bilateria contains (3) - Answer- Lophotrocozoa, ecdysozoa, and deuterostomia T OR F Flatworms are acoelomates - Answer- true What regulates the osmotic balance in flatworms - Answer- protnephridia What are the best-known rabditphorans - Answer- planarians planarians use _____ to see - Answer- light sensitive eyespots Planarian anatomy - Answer- Two different types of rhabditophorans - Answer- trematodes and tapeworms trematodes - Answer- parasite that spend most of their life in snails. they have alternating sexual and asexual stages tapeworms - Answer- parasites of vertebrates that lack a digestive system. absorb nutrients from the host's intestine the tapeworms units that contain sex organs - Answer- proglottids Rotifers - Answer- tiny animals that inhabit fresh water, the ocean, and damp soil A digestive tube with a separate mouth and anus that lies within a fluid filled pseudocoelom - Answer- Alimnetary canal The process where females produce offspring from unfertilized eggs - Answer- parthenogenesis Sessile colonial animals that superficially resemble plants - Answer- ectoprocts Animals that superficially resemble clams and molluscs - Answer- Brachiopods Phylum mollusca contains what animals - Answer- Snails, slugs, oysters, clams, octopuses, and squids. What are the three main body parts of molluscs - Answer- Muscular foot, visceral mass, and a mantle Many molluscs have two other body parts - Answer- Mantle cavity and radula The gonads of molluscs are located where - Answer- visceral mass Four major classes of molluscs - Answer- Polyplacophora, gastropoda, bivalvia, and cephalopoda. Chitons - Answer- oval shaped marine animals encased in armor Gastropods - Answer- Mostly snails and slugs, have a spiraled shell, and are herbivores. Clams mussels and scallops are - Answer- Bivalves Carnivores with beaklike jaws surrounded by tentacles - Answer- cephalopods Coelomates with bodies composed of a series of fused rings - Answer- Annelids Mobile, marine organisms that have parapodia on each body segment - Answer- errantians Clade that contains leeches and earthworms. Usually less mobile than errantians - Answer- Sedentarians Predators of invertebrates and parasites that suck blood - Answer- leeches Tough coat that ecdysozoans are covered by - Answer- cuticle The cuticle is then molted in a process called - Answer- ecdysis