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In a newly fertilized egg, the vitelline layer ______. A. lifts away from the egg and hardens to form a fertilization envelope B. secretes hormones that enhance steroidogenesis by the ovary C. reduces the loss of water from the egg and prevents desiccation D. provides most of the nutrients used by the zygote

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shaikhmohd0119

In a newly fertilized egg, the vitelline layer lifts away from the egg and hardens to form a fertilization envelope.

Therefore, the correct answer is Option A.

What is vitelline layer?

  • Vitelline layer or vitelline membrane (VM) is a structure that surrounds the outer surface of the plasma membrane of an egg or ovum. In some organisms (e.g.: birds), the vitelline layer surrounds the extracellular yolk and the ovum.
  • It is multilayered and functions to protect and give shape to the egg yolk and separate it from the egg white.
  • VM consists of protein fibers and protein receptors necessary for sperm binding.
  • As its function is to provide support and protection to the yolk, after fertilization, the vitelline layer gets hardened and separated from the yolk to form fertilization envelope.

Learn more about fertilization in sea urchins here:

https://brainly.com/question/10019212

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