Abstract
Fertilized eggs of the sea urchin, Hemicentrotus pulcherrimus and the starfish, Asterina pectinifera were separated by manual bisection to obtain pairs of nucleate and non-nucleate fragments. Simultaneous observation on the pair revealed that the cyclic change in the cortical tension in the non-nucleate fragment was definitely prolonged than the cleavage interval of nucleate partner by about 30%. Activated non-nucleate cytoplasmic fragments derived from the unfertilized eggs and colchicine treated whole eggs of H. pulcherrimus still showed the same degree of prolongation.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
