Explain the penetration the male gamete to the egg cell
Explain the penetration the male gamete to the egg cell? How does the female gamete defend itself from the entry of more gametes after the entry of the first sperm cell?
Expert
The sperm cell that arrives at the egg cell activate the acrosome response, a procedure in which hydrolytic enzymes of the acrosome are freed on the exterior surface of the zona pellucid (the protective cover that surrounds the egg cell). A part of this cover is digested by the acrosomal enzymes permitting the sperm cell to attain the plasma membrane of the egg cell carrying out fecundation. At the point that the sperm cell establishes contact with the egg cell membrane a chemical change of this membrane happens. Enzymes secreted by exocytosis (cortical reaction) create the zona pellucida unable to bind to other sperm cells (zonal reaction) and other male gametes can’t enter the egg cell.
PRINCIPLE OF DECISION MAKING The various principles of decision making are: 1. Princ
Write down the some examples of human cells which produce proteins for exportation? Which cytoplasmic organelle is anticipated to be well-developed and profuse in those cells?
ADMINISTRATIVE MANAGEMENT Henry Fayol's Contribution Q : Difference between marketing and Difference between marketing & advertising: Advertising is paid, public and non-personal announcement of a persuasive message through a recognized sponsor the non-personal presentation
Difference between marketing & advertising: Advertising is paid, public and non-personal announcement of a persuasive message through a recognized sponsor the non-personal presentation
In the article, DeMarie, S.M. and B.W. Keats, “Deregulation, Reengineering, and Cultural Transformation at Arizona Public Service Company”, Organizational Dynamics 23 no.3 (Winter 1995): 70-76. 1. What environmental forces were affecting APS? 2. In what ways did they motivate change? 3. What we
The bigger the size of the perceived stimulus, the higher is the probability that it is perceived. Size attracts the attention of an individual. It establishes dominance and enhances perceptual selection.
What are the main functions of Humoral immunity? Briefly describe it.
What do active transport and facilitated diffusion enfold in common? And also write down the differences between them.
What do you mean by the nerves?
Write down the some fungal diseases transmitted by the animal feces?
18,76,764
1954551 Asked
3,689
Active Tutors
1421874
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!