oceanography: Marine phylum

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Across
  1. 5. What are phylum arthopoda's characteristics?
  2. 8. trilobites and crustaceans(crabs and lobsters...).
  3. 9. mollusks:snails, slugs, clams, squid, and octopuses.
  4. 11. phylum Porifera
  5. 13. the Mesozoic era is the age of ________?
  6. 15. sea stars, sea urchins, and sea cucumbers.
  7. 16. What time period had the first normal shelled organism?
  8. 18. what are phylum Chordata's characteristics?
  9. 21. What are phylum Cnidaria's characteristics?
  10. 22. What phylum has these characteristics: toothed tongue-like radula to help chew plants, fleshy foot for movement, gill, mantle, and 1+ shells.
  11. 23. 66 million years ago-today?
Down
  1. 1. The cenozoic era is the age of________?
  2. 2. 4.6 billion years to 541 million years ago?
  3. 3. What are phylum Echinodermata's characteristics?
  4. 4. what is the oldest known shark species that is still alive today?
  5. 6. jellyfish, sea anemones, and corals
  6. 7. reef what shark species grabs their mates pectoral fin to mate with a female?
  7. 10. 272 million-541 million years ago?
  8. 12. what is the most advanced shark species?
  9. 14. what shark species uses its wide head to search for fish on the ground.
  10. 15. What phylum has these characteristics: filter feeders, water drawn into pores by flagellated cells, and filter bacteria and other edible particles out of water.
  11. 17. 66 million years to 272 million years ago?
  12. 19. mammals, fish, amphibians, reptiles, and birds.
  13. 20. what shark species uses its camoflague and speed to catch food?