In the transverse section of the gastrula shown, which germ layer lies between the outer ectoderm and the inner endoderm? 
ABlastocoel
BMesoglea
CMesoderm
DArchenteron
Answer & Solution
Correct answer: C. Mesoderm
In a triploblastic gastrula, the middle germ layer between ectoderm and endoderm is the mesoderm. Blastocoel and archenteron are cavities, while mesoglea is characteristic of diploblastic animals.
Related questions
At which embryonic stage are the primary germ layers first clearly established in animals?Which statement correctly defines germ layers?A diploblastic animal is characterized by the presence of which of the following?Which of the following groups is triploblastic?Coelom is best defined as:An animal is called a true coelomate when its body cavity is:Which figure represents a pseudocoelomate condition, where mesoderm is present as scatterePlatyhelminthes are acoelomates because: