Exam 3 study guide

Exam 3 study guide - 1. Animals ingest their food 2....

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
1. Animals ingest their food 2. Nervous tissue and muscle tissue, blastula stage 3. Hox genes regulate the development of body form. They’re highly conserved (they haven’t gone through a lot of evolutionary changes) 4. Flagellated protists, choanoflagellates 5. Deuterostomia – second mouth develops into the anus, a. Protostomia – first opening develops into the anus b. Diploblast – two germ layers (sponges and hydras) c. Triploblast – three germ layers d. Bilateral symmetry – divided into two halves e. Radial symmetry – symmetrical around a central axis 6. Gastrulation 7. Cleavage 8. Zygote undergoes cleavage to form a blastula (hollow ball), blastula undergoes gastrulation to form a gastrula a. During gastrulation, if the blastopore forms a mouth, then it’s a protostome b. If it forms an anus, then it’s a deuterostome 9. Germ layer – (mesoderm, endoderm, ectoderm) a. Archenteron – gap created by gastrulation b. Coelom – fluid filled cavity formed in the mesoderm
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online