Bio 94 Midterm 2

  1. Coelomates
    have an enclosed body cavity completely lined with mesoderm
  2. Acoelomates
    have no enclosed body cavity
  3. Pseudocoelomates
    have an enclosed body cavity partially lined with mesoderm
  4. Phylum: Porifera
    • ex. Sponges
    • No plane of symmetry
    • Lack nerves, muscles
    • Several cell types
    • Suspension feeders
    • Sexual and asexual reproduction
  5. Phylum: Cnidaria
    • ex. jellyfish and coral
    • radial symmetry
    • 2 germ layers
    • First true Hox genes
    • Nerves and muscle-like tissue
  6. Phylum: Platyhelminthes
    • ex. Flatworms
    • lost coelom
    • Free living and parasites
    • no structures for gas exchange or circulation
    • Head ganglion, longitudinal nerve cord
  7. Phylum: Annelida
    • Coelom
    • Segmented worms (repeated body structures)
    • Bristles (chaetae)
  8. Phylum: Mollusca
    • Coelem reduced
    • Common traits:
    • -- foot
    • -- mantle
    • -- visceral mass
    • -- radula
  9. Three types of Mollusca
    • Bivalvia (clams, oysters)- Two shells
    • Gastropoda (snails, slugs)- Means “belly foot” aka Its “belly” is the foot
    • Cephalopoda (octopus, squids)- Means “head foot” aka foot is on its head
  10. Bivalvia
    (clams, oysters)- Two shells
  11. Gastropoda
    (snails, slugs)- Means “belly foot” aka Its “belly” is the foot
  12. Cephalopoda
    (octopus, squids)- Means “head foot” aka foot is on its head
  13. Phylum :Nematoda
    parasitic species
  14. Phylum: Arthropoda (3 types)
    • Crustaceans
    • Chelicerates
    • Insects
  15. Crustaceans
    • 2 pairs of antenna & 2 body regions (cephalothorax & abdomen)
    • ex) crabs
  16. Chelicerates
    • NO Antennae, 4 pairs of legs, 1 pair of chelicerae (fangs), 1 pair of pedipalps, ONLY a cephalothorax
    • ex) spiders, ticks, scorpions
  17. Insects
    1 pair of antenna, 3 body regions, 1 pair of compound eyes, 1 or 2 pairs of wings, 3 pairs of legs
  18. Phylum: Echinodermata
    • star fish
    • radial symmetry
  19. Phylum: Chordata
    • notochord
    • ex. fish, humans, cats
  20. Batesian Mimicry
    looking harmful when its harmless
  21. Anapsid
    no holes on side of skull
  22. Synapsid
    one hole on side of skull
  23. Diapsid
    two holes on side of skull
Author
jocelyn0399
ID
338495
Card Set
Bio 94 Midterm 2
Description
phylum, things I still need to know
Updated