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Animal Phyla
YGK These Animal Phyla
| Question | Answer |
|---|---|
| What phylum includes sponges? | Porifera |
| Approximately how many species are in Porifera? | About 5,000 |
| What type of habitats do sponges live in? | Mostly marine, some freshwater |
| Why are sponges sometimes classified separately from other animals? | They lack distinct tissues and have asymmetrical bodies |
| What does sessile mean? | Immobile |
| What cells do sponges use to collect food particles? | Choanocytes |
| What phylum is also called Coelenterata? | Cnidaria |
| How many species are in the phylum Cnidaria? | About 10,000 |
| What type of embryo do cnidarians develop from? | Diploblastic embryo |
| What body symmetry do cnidarians have? | Radial symmetry |
| What are the two life stages of many cnidarians? | Medusa and polyp |
| Stinging cells used to capture prey | Nematocysts |
| Hydras, sea anemones, corals, jellyfish, and Portuguese man-o-war are all examples of this phylum | Cnidarians |
| What phylum contains flatworms? | Platyhelminthes |
| Approximately how many species are in Platyhelminthes? | About 15,000 |
| What type of embryo do flatworms develop from? | Triploblastic embryo |
| What body symmetry do flatworms have? | Bilateral symmetry |
| Lacking a true body cavity | Acoelomate |
| How many openings does the flatworm digestive system have? | One opening that acts as mouth and anus |
| Are most flatworms hermaphroditic? | Yes |
| Tapeworms, flukes, and planarians are all examples of this animal phylum | Flatworms |
| What phylum includes roundworms? | Nematoda |
| Approximately how many species are in Nematoda? | About 15,000 |
| Body cavity not fully lined by mesoderm | Pseudocoelomate |
| Are nematodes segmented? | No |
| Are nematodes free-living or parasitic? | Both |
| Elephantiasis, trichinosis, and river blindness are all caused by this animal phylum | Nematodes |
| What nematode is commonly used in genetics research? | Caenorhabditis elegans |
| What phylum contains segmented worms? | Annelida |
| Approximately how many species are in Annelida? | About 11,500 |
| Body cavity fully lined with mesoderm | Eucoelomate |
| What structures function like kidneys in annelids? | Nephridia |
| Polychaeta, Oligochaeta, and Hirudinea are all subclasses of this phylum | Annelids |
| What annelids are commonly known as leeches? | Hirudinea |
| What phylum is the most diverse animal phylum? | Arthropoda |
| Jointed legs and chitinous exoskeleton are characteristics of what phylum? | Arthropods |
| About what percentage of described animal species are arthropods? | About 75% |
| How are arthropod body segments arranged? | Fused into specialized body parts |
| What are the four major arthropod subphyla? | Uniramia, Chelicerata, Crustacea, Trilobitomorpha |
| What arthropod group is extinct? | Trilobites |
| What phylum is second in diversity to arthropods? | Mollusca |
| Approximately how many species are in Mollusca? | About 50,000 |
| What structure secretes the mollusc shell? | Mantle |
| What is the muscular structure used for movement in molluscs? | Foot |
| What type of circulatory system do most molluscs have? | Open circulatory system |
| What are major mollusc classes? | Gastropoda, Bivalvia, Cephalopoda |
| What phylum includes animals with a water vascular system? | Echinodermata |
| Approximately how many species are in Echinodermata? | About 6,500 |
| What type of symmetry is unique to echinoderms? | Five-fold radial symmetry |
| What structures are used for movement in echinoderms? | Tube feet |
| What feeding structure do sea urchins use? | Aristotle’s lantern |
| What terms describe echinoderm body orientation? | Oral and aboral |
| What phylum includes humans? | Chordata |
| Approximately how many species are in Chordata? | About 44,000 |
| What are the four defining traits of chordates? | Pharyngeal gill slits, notochord, dorsal hollow nerve cord, post-anal tail |
| What are the three chordate subphyla? | Urochordata, Cephalochordata, Vertebrata |
| What organism is often used to demonstrate chordate traits? | Amphioxus |
Created by:
divyap
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