Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
How does the male gamete penetrate the egg cell? How does the female gamete protect itself from the entrance of more gametes after the entrance of the first sperm cell?
The sperm cell that reaches the egg cell triggers the acrosome reaction, a process in which hydrolytic enzymes of the acrosome are released on the external surface of the zona pellucida (the protective layer that surrounds the egg cell). A portion of this layer is digested by the acrosomal enzymes permitting the sperm cell to reach the plasma membrane of the egg cell carrying out fecundation.
At the moment that the sperm cell makes contact with the egg cell membrane a chemical alteration of this membrane happens. Enzymes secreted by exocytosis (cortical reaction) make the zona pellucida unable to bind to other sperm cells (zonal reaction) and other male gametes cannot enter the egg cell.
Definition of a neuropsychological test The best definition of a neuropsychological test has been offered by Ralph Reitan, who described it as a test that is sensitive to the
Indifferences in ionic composition Answer A. across membranes can be created through the action of ATP driven pumps as long as number of negative and positive ions on remain equal
Homo sapiens first appeared in the fossil record between 200,000 to 300,000 years ago, The fossils were the Swanscomb man from England and Steinheim man from Germany. a) The Swa
Bleeding Bleeding from injury to small blood vessels pushed along the lateral wall of expanding maxillary sinus should be contained by bone wax or electrocautery rather than cr
State the term - Symbolic representation Symbolic representation is the representation of both the external and internal world through symbols and has been discussed in relatio
Different Feeding Habits Feeding habits of animals depend on the nature of the food consumed. Herbivorous : When plants are eaten. Examples - Horse, cow, rabbit, apes.
Making a rock collection A collection of the common rocks found in the community can be made by asking every pupil to bring in single piece of rock. Explain to the pupils that
Q. Explain Spoilage of pasteurized milk? You would recall that pasteurization is one of the techniques to control and destroy the pathogenic, as well as, .spoilage bacteria i
Transplantation - It is implanting of a living or preserved tissue or organ from one site to another side in the same individual or from one individual called donor to recip
Which of the following best explains what would happen if recombination (crossing-over) happens during mitotic prophase? A. Recombination during mitosis will lead to segregatio
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd