Abstract
1. Starch is formed from the pyrenoids in the vegetative cells, in all stages of the division of the asexual colony, in all stages of the egg before and after fertilization, and in the mature zygote. It is most actively formed in the mature egg and in the early stages after fertilization. 2. The nuclei of the daughter colony cells remain on the inward side of the cell, but as the colony matures the pore enlarges and the colony turns inside out through the enlarged pore. 3. Sperms enter the side of the egg from the inside of the colony through a pore in the oogonium wall, behind which is a receptive spot. The sperm nucleus increases greatly in size and comes in contact with the egg nucleus. The nuclear membranes of the egg and sperm dissolve at the point of contact, and the sperm nucleolus and its chromatin mass enter the egg nucleus. In the mature zygote the chromatin masses have united.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
