× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
4
C
4
s
4
a
4
t
4
i
4
r
4
New Topic  
ppk ppk
wrote...
Valued Member
On Hiatus
Posts: 3561
12 years ago
In humans, identical twins are possible because     
A) of interactions between extraembryonic cells and the zygote nucleus.
B) the gray crescent divides the dorsal-ventral axis into new cells.
C) of convergent extension.
D) early blastomeres can form a complete embryo if isolated.
E) of the heterogeneous distribution of cytoplasmic determinants in unfertilized eggs.
Read 1567 times
1 Reply

Related Topics

Replies
wrote...
Educator
12 years ago
D
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  1282 People Browsing
Related Images
  
 867
  
 556
  
 7207
Your Opinion