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umka21 [38]
4 years ago
8

What causes formation of the fertilization envelope?

Biology
1 answer:
Sonja [21]4 years ago
4 0

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.

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Answer:

B) ecosystem, community, population, individual

Explanation:

An ecosystem is the most inclusive level of the ecological system for it comprises of both living and non living organisms that are joined together through the nutrient cycle and the flow of energy. An ecosystem is made up of different communities.

A community comprises of organisms of different species that live and interact with one another in the same habitat.A community is formed  by different populations.

A  population is made up of many individuals of the same species that can interbreed to give rise to viable offsprings and end up forming a community.

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