Invertebrate diversity - o Acoelomate, Psedocoelomate,...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Invertebrate diversity 06/04/2009 08:06:00 What are animals: Multicelluar with special cells connections hetrotropic and ingest food diploid dominant no cell walls-held together by structural proteins tissues that develop from embryonic layers nervous tissue and muscle tissue unique HOX genes WHERE DID THEY COME FROM common ancsestor of living animals? molecular evidence…875-675 mya Porifera: Sponges sedentary filter feeders Camberian Explosion” 535-525 mya Why in Ocean? water supportage ***no plants on land yet…animal group older than plants Traditional tree based morphological and developmental comparisons? number of tissues layers in embryo o diploblastic vs triploblastic Type of symmetry o radial sym vs bilateral Body cavity?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: o Acoelomate, Psedocoelomate, Coelomate Deuterostome vs. Protosome o Blastopore fate, cleavage type, Coelom formation Animal Phylogeny (Metazoa) Ancesterol colonial flagellate Basal Metazoa Bilaterial-bilaterial symmestry, triploblastic, cephalization Deuterostome Lophtrochoza, Ecdysozoa These Phylogeny agree on? All animals hare a common ancestor Sponges are basal animals Eumetoazoa is a clade with true tissues Most animal phyla belong to bilaterial clade Chordates and Echnioderms are in Deuterosome Ctenophore (Comb Jelly) 4 combs of silia predatory life style sticky coblast to grab prey with 06/04/2009 08:06:00 06/04/2009 08:06:00...
View Full Document

Page1 / 4

Invertebrate diversity - o Acoelomate, Psedocoelomate,...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online