If antibodies to fibronectin are exposed to an embryo through which neural crest cells are migrating, what happens?
a) neural crest cell movements are inhibited.
b) neural crest cell movements are excited.
c) neural crest cells die
d) neural crest cells divide
e) neural crest cells convert into muscle

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

i am sorry but i need more information and a picture.