In a Newly Fertilized Egg, the Vitelline Layer

question 39

Multiple Choice

In a newly fertilized egg, the vitelline layer

• A) opens the egg's nuclear membrane to allow haploid sperm DNA to enter.
• B) hardens to form a protective cover.
• C) secretes hormones that enhance steroidogenesis by the ovary.
• D) reduces the loss of water from the egg and prevents desiccation.
• E) provides most of the nutrients used by the zygote.