Protection of female gametes from male gametes
Explain, how the male gametes go through the egg cell? How the female gametes guard itself from entry of more gametes after the first sperm cell?
Expert
Sperm cell which reaches the egg cell activates the acrosome reaction, a procedure where the hydrolytic enzymes of the acrosome are liberated on the external surface of zona pellucida (a protective layer that surrounds the egg cell). Portion of this layer is digested by acrosomal enzymes offering the sperm cell to arrive at the plasma membrane of the egg cell performing the fecundation.
At the moment, that sperm cell forms the contact with egg cell membrane a chemical alteration of this membrane takes place. Enzymes liberated by the exocytosis form the zona pellucida not capable to bind to other sperm cells and other male gametes are not able to enter the egg cell.
Give a brief explanation of the term biome.
1) Is a given factor and input or an outcome? For example, "responsibility" is viewed by some as input and as output by others. 2) How does a person choose (or change) the comparison other? 3) Under what circu
Which are the more plentiful ribosomes in secretory cells-the free cytoplasmic ribosomes or such related with the rough endoplasmic reticulum?
Are arteries or the veins comprised of more muscle tissue? How dissimilar are the walls of such two kinds of blood vessels?
What is meant by the connective tissue proper?
What is the basic difference between the alpha-helix and beta-sheet protein conformations?
Name the device which is utilized for counting RBC? Answer: Haemocytometer is a device utilized for counting the red blood cells per millimeter of blood.
What is Banana bond? Diborane comprises how many banana bonds.
Advent of Electronic Communications: In the late ‘90s, a new means of communication was discovered - the electronic medium. The electronic technology of communication transformed the workplace. Though the advantages are numerous
Describe briefly the term plant hormones?
18,76,764
1955675 Asked
3,689
Active Tutors
1413183
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!