The flashcards below were created by user rica_ross on FreezingBlue Flashcards.

  1. Animals
    • No cell walls
    • No large central vacoules
    • Usually no Chloroplasts
    • Have centrioles to aid in spindle formation
    • Store excess sugars as glycogen rather than starch
  2. Polyphyletic
    Refers to groups of organism composed of members that do not share a unique common ancestors
  3. Paraphyletic
    Refers to a portion of a group that contains members having the same common ancestor but that does not include every descendant species of that common ancestor
  4. Porifera
    • Sponges
    • Lack Vascular tissues
    • Cells are not specialized in to particular tissue 
    • Lack Tissue
  5. How animal kingdom was divided
    • Initially by symmetry (bilateral, radial)
    • Body Cavities
  6. Radial
    Have bodies stretching out in equal directions from a central point, round organisms
  7. Bilateral
    • Organized along one vertical or horizantal axis and tend to be long and thin
    • All vertebrates
    • Bilateral symmetric animals are further divided by body cavities
  8. Coelom
    • Body cavity in addition to digestive tract
    • usually fluid filled cushion space
    • Body cavity lined by muscle tissue and blood vessels both on outer surface and inner one surrounding entire digestive tract
  9. Dorsal
    • Back
    • Stomach
    • Head
    • Tail
  10. Acoelomate
    No body cavity between gut and outer wall
  11. Pseudocelomate
    Body cavity that is lined by muscles and blood vessel only on the outside surface of cavity
  12. Porifera
    • Sponges
    • Two cell layers
    • Silicon and calicum skeletons
    • No symmertry
  13. Cnidaria
    • Jelly, corals, hydra
    • Two cell layers
    • Bag like with tentacles
    • Radially symmetric
    • Stinging cells (neumatocysts)
  14. Platyhelminthes
    • Flatworms, tapeworks
    • Flat and ribbon like
    • Many parasitic
    • Lack skeletal, circulatory, respitatory
    • Dorsal Ventral nerves
    • aceolomate
    • Bilateral symmetric
  15. Ascheminthes
    • Roundworms, rotifers
    • Body slender and elongate
    • Posses internal organs
    • Many parasitics
    • Pseudocelomate
    • Bilateral
  16. Annelida
    • Earthworms and leeches
    • Body internally and externally segment
    • Many internal organ repeated throughout
    • Coelomate 
    • Bilateral Symmteric
  17. Mollusca
    • Clams oyster snails
    • Mainly hard shelled
    • All organ systems present
    • No segment
    • Coelomate
    • Bilateral
  18. Arthopoda
    • Insects Crabs
    • Exoskeleton
    • segmentation
    • Ventral Nerve chord
    • segmentatoin
    • Coelomate
    • Bilateral
  19. Echinodermata
    • Sea Stars Urchin
    • Coelomate
    • Deuterstome
    • Adult radial, Larvea Bilateral
    • Water Vascular System
    • Tube feet for feeding and move
  20. Chordata
    • Sea squint and all vertebrates
    • Notochord often becomes vertebral column
    • Paired gill slits
    • Dorsal nerve chord
    • coelomate
    • Bilateral
  21. Protostomes
    • Arthopods, Mollusks, anelids
    • Determinate Cleavage
    • Mouth develops first
  22. Deuterstomes
    • Echinodermata, Chordata
    • Indeterminate Cleavage
    • Embryonic cells retain ability to split off and develop into new complete embryos long into development
    • Mouth develops second
    •  Radial indeterminate clevage
  23. Arthopoda
    • Most Successful Phylum on Earth
    • Insects 
    • Crustaceans
    • Spiders
  24. Segmentation
    Specialized appendages modified for variety of functions and bendng joints
  25. Exoskeletons
    cuticle made of chitin
  26. Molting
    Shed exoskeleton as grows
  27. Dorsal, Hollow nerve chord
    • AlsoDevelops from pinching up of dorsal ectoderm (neural tube) during embryo growth
    • Develops in CNS
  28. Notochord
    • All chordata have longitudinal bendible rod of tissue between gut and nerve cord, for support can turn in to bony vertebra
    • From mesodermal cells
  29. Muscular Tail
    • Almost all have at somepoint in their development humans
    • Tail bone is vestigial
  30. Gill slits
    • At some point all vertebrate have small slits within throat 
    • many vertebrate close quickly with in development
Card Set:
2013-09-25 00:33:11
Biology GRE

Biology GRE
Show Answers: