Answer:
Sperm-egg interaction
Explanation:
The formation of fertilization envelope is well-studied on the model system- sea urchin. It has been shown that, the fertilization envelope is formed after the initial sperm-egg interaction from the egg surface vitelline envelope and the paracrystalline protein fraction which is derived from cortical granules. Secretion from cortical granules, prevents polyspermy.
Giraffes are quickly losing their living spaces.
four main threats are habitat loss, civil unrest, illegal hunting, and ecological changes
this is what i got from google
While scientists have made enormous discoveries, there is always more to learn. Knowledge is built on and reviewed. Sometimes new information reveals an error in understanding from the past. The study of how the world works is always ongoing.
Vaccines train our immune systems to create proteins that fight disease, known as antibodies’
Hawaii are the more hotspots area of volcanos. occurs in the type of temperature
