embryological development

Question 1

Cleavage

Answer 1

lower animal
-diploblastic
-produces tissues not organs
-porifera
higher animal
- triploblastic
-produces tissues and organs

Question 2

protostome vs deuterostome

Answer 2

protostome
- blastopore: mouth
- arthropods + mollusks
deuterostome
- blastopore: anus
- chordates + echinoderms

Question 3

blastopore

Answer 3

• during primitive gut formation, the opening that connects the gut cavity to the outside of the embryo
• mouth of protostome
• anus of deuterostome