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Biology Animal Exam
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| Question | Answer |
|---|---|
| The phylum for starfish, sea stars, sea urchins, and sand dollars is____ | Echinodermata |
| What term means “mouth develops first”? | protostome |
| What term means “anus develops first”? | deuterostomes |
| Are mollusks (clams & squid), annelids (earthworms), and arthropods: protostomes or deuterostomes? | protostomes |
| Are echinoderms and chordates: protostomes or deuterostomes? | deuterstomes |
| A system of fluid-filled closed tubes that work together to enable echinoderms to mover and get food? | Water-vascular system |
| The strainer-like opening to the water-vascular system is the____ | madreporite. |
| Small, muscular, fluid-filled tubes that end in suction-cuplike structures that are used in movement, food collection, and respiration are called____ | tube feet. |
| What is unique about the feeding and digestion of echinoderms? | They digest food OUTSIDE their body. |
| Relationships in which one organism benefits and the other organism is neither helped nor harmed is called____ | commensalism. |
| Give an example of an echinoderm commensalistic relationship: | brittle stars live inside a sponge where they are protected and feed on material that have settled on the sponge |
| What benefit do echinoderms give to the ecosystem? | They are bioturbators meaning they stir up sediment on the ocean floor to supply nutrients to other organisms. They also keep algae populations down (algae can destroy coral reefs) |
| How do echinoderms harm the ecosystem? | They destroy coral reefs if they are too many of them. They eat kelp forests, destroying habitats for fish, snail, and crabs |
| Which group of chordates have backbones? | vertebrates |
| Which group of chordates are without backbones? | invertebrates |
| Name two examples of invertebrate chordates: | tunicates and lancelets (amphioxus) |
| Name the four distinctive features of chordates (member of the phylum Chordata): | dorsal, tubular nerve cord; notochord; pharyngeal pouches, postanal tail |
| What does the anterior dorsal tubular nerve cord become in chordates? | Brain |
| What does the posterior dorsal tubular nerve cord become in chordates? | Spinal cord |
| are a group of fish without jaws, scales, paired fins, or bony skeleton | jawless fish |
| include the lamprey and jagfish | jawless fish |
| are a group of fish with cartilage instead of bone | cartilaginous fish |
| include the sharks, skates, and rays | cartilaginous fish |
| belong to the class Chondrichthyes | cartilaginous fish |
| belong to the class Osteichthyes | bony fish |
| include crappie, bass, bream, perch, salmon | bony fish |
| are a group of fish with bones | bony fish |
| are a group whose members can live on both land and in water | amphibians |
| undergo metamorphosis like from a tadpole to a frog | amphibians |
| include frogs and salamanders | amphibians |
| includes snakes and turtles | reptiles |
| have an amniotic egg; dry, scaly skin | reptiles |
| have an amniotic egg and feathers | birds |
| are members of the class Aves | birds |
| have an amniotic egg, hair, and breasts to feed the young | mammals |
| include humans, pigs, deer, cows, whales | mammals |
| What is the importance of the amniotic egg? | It has a watery environment for the development of the embryo of reptiles, birds, and mammals allowing members of these three groups to live entirely on the land without having to return to the sea to give birth to their young |