In sea urchins, the Blank______ process forms under the sperm's plasma membrane and extends through the Blank______ envelope to the egg's plasma membrane to allow the sperm nucleus to enter the egg.Multiple choice question.polarizing; zona pellucidaacrosomal; zona pellucidapolarizing; vitellineacrosomal; vitelline
Question
In sea urchins, the Blank______ process forms under the sperm's plasma membrane and extends through the Blank______ envelope to the egg's plasma membrane to allow the sperm nucleus to enter the egg.Multiple choice question.polarizing; zona pellucidaacrosomal; zona pellucidapolarizing; vitellineacrosomal; vitelline
Solution
The correct answer is "acrosomal; vitelline".
Step by step explanation:
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In sea urchins, the process that forms under the sperm's plasma membrane is the acrosomal process. The acrosomal process is a long, thin projection that extends from the sperm head after the acrosome reaction.
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This acrosomal process extends through the vitelline envelope, which is the protective layer around the egg.
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The purpose of this process is to allow the sperm nucleus to enter the egg, which is a crucial step in fertilization.
So, the correct fill in the blanks would be "In sea urchins, the acrosomal process forms under the sperm's plasma membrane and extends through the vitelline envelope to the egg's plasma membrane to allow the sperm nucleus to enter the egg."
Similar Questions
Which of the following best describes how the sperm nucleus enters the egg in sea urchins?Multiple choice question.The acrosomal process extends through the egg's vitelline envelope to the egg's plasma membrane to allow the sperm nucleus to pass through to the egg.The sperm head burrows through the zona pellucida to the egg, and the sperm nucleus passes directly into the egg cytoplasm.
Which of the following macromolecules attracts water into the space between the vitelline envelope and the egg surface, preventing polyspermy in sea urchins?Multiple choice question.HyalinGlucoseCholesterolHyaluronic acid
In sea urchins, the process of fertilization produces a(n) _____.
Multiple Choice QuestionThe structure of a sperm that forms over the nucleus is the ______.Multiple choice question.midpiecetailacrosome cap
Multiple Choice QuestionThe extraembryonic membrane that is the first site of blood cell formation in mammals is the Blank______.Multiple choice question.allantoisyolk sacamnionchorion
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