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5 Cards in this Set
- Front
- Back
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CEPHALIZATION |
THE DIFFERENTIATION AND CONCENTRATION OF SENSE ORGANS AND NERVOUS TISSUE IN THE ANTERIOR PORTION OF THE BODY. FORMATION OF HEAD |
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KEY TRANSITIONS |
*First key transition- evolution of tissue
*Second key transition- evolution of bilateral symmetry.
* Third key transition- evolution of coelom |
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Proterospongia |
It is a protozoan that connects to porifera. Resembles choanocytes of poriferans. |
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Larvae of phyla |
1) Porifera - Coeloblastula or amphiblastula larva or parenchymella larva or Trichinella. 2) Cnidaria - planula larva 3) Ctenophora- cydippid larva 4) Platyhelminthes- Fasciola- miracidium larva. 5) Aschelminths- four moults. 6) annelida- direct 7)arthropoda - maybe direct may not be. . 8) mollusca- trochophore larva or velliger larva.9) Echinodermata- free swimming larva. 10) Hemichordata- tornaria larva 9) Echinodermata- free swimming larva. 10) Hemichordata- tornaria larva |
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Polymorphism |
Physalia |
