Asymmetry is the lack of symmetry.
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.
First one i thnk???
brainliest
The one on Earth’s surface is a meteorite.
The one in earth’s atmosphere is a meteoroid.
And the one in space is a meteor.
