Exam Prep for General Biology | Channels for Pearson+

Skip to main content

My Courses

AI Tools Channels Home

20. Development

20. Development / Animal Development / Problem 6

All of the following are common in the development of both birds and mammals except:

A

Ectoderm, mesoderm, and endoderm

B

Central nervous system formation

C

Placenta

D

Amniotic sac

Was this helpful?

Learn this concept