Since Jiskha doesn't have a biology expert at this time, please try posting your question at this site.
http://www.biology-online.org/biology-forum/
In addition, be sure to make really good use of KhanAcademy!
http://www.khanacademy.org/science/biology
Choose from the general topics at the right and then find the specifics you need within each topic.
We learned about many different animal phyla. How do scientists classify animals to determinewhich phyla they belong to?
a. Adult Body Plan
b. Embryological Development
c. Animal Body Sized.
d. Both a and b are correct
2 answers
both a and b