The correct answer is Hyalin.

Here's a step-by-step explanation:

1. Polyspermy is the fertilization of an egg by more than one sperm, which can lead to abnormal development and is therefore usually prevented in organisms.

2. In sea urchins, this prevention is achieved by a fast block and a slow block to polyspermy. The fast block involves a change in the egg's electrical charge, preventing further sperm from fusing with the egg.

3. The slow block involves the release of cortical granules from the egg upon fertilization. These granules release enzymes that cause the vitelline envelope (a protective layer around the egg) to lift away from the egg and harden into a fertilization envelope.

4. One of the substances released by the cortical granules is hyalin. Hyalin is a glycoprotein that forms a layer around the egg and helps to lift the vitelline envelope. It also attracts water into the space between the vitelline envelope and the egg surface, further helping to prevent polyspermy.

5. Therefore, the correct answer to the question is hyalin. Glucose, cholesterol, and hyaluronic acid do not play the same role in preventing polyspermy in sea urchins.

Question

The correct answer is Hyalin.

Here's a step-by-step explanation:

1. Polyspermy is the fertilization of an egg by more than one sperm, which can lead to abnormal development and is therefore usually prevented in organisms.

2. In sea urchins, this prevention is achieved by a fast block and a slow block to polyspermy. The fast block involves a change in the egg's electrical charge, preventing further sperm from fusing with the egg.

3. The slow block involves the release of cortical granules from the egg upon fertilization. These granules release enzymes that cause the vitelline envelope (a protective layer around the egg) to lift away from the egg and harden into a fertilization envelope.

4. One of the substances released by the cortical granules is hyalin. Hyalin is a glycoprotein that forms a layer around the egg and helps to lift the vitelline envelope. It also attracts water into the space between the vitelline envelope and the egg surface, further helping to prevent polyspermy.

5. Therefore, the correct answer to the question is hyalin. Glucose, cholesterol, and hyaluronic acid do not play the same role in preventing polyspermy in sea urchins.

Knowee AI · Accepted Answer

The correct answer is Hyalin.

Here's a step-by-step explanation:

1. Polyspermy is the fertilization of an egg by more than one sperm, which can lead to abnormal development and is therefore usually prevented in organisms.

2. In sea urchins, this prevention is achieved by a fast block and a slow block to polyspermy. The fast block involves a change in the egg's electrical charge, preventing further sperm from fusing with the egg.

3. The slow block involves the release of cortical granules from the egg upon fertilization. These granules release enzymes that cause the vitelline envelope (a protective layer around the egg) to lift away from the egg and harden into a fertilization envelope.

4. One of the substances released by the cortical granules is hyalin. Hyalin is a glycoprotein that forms a layer around the egg and helps to lift the vitelline envelope. It also attracts water into the space between the vitelline envelope and the egg surface, further helping to prevent polyspermy.

5. Therefore, the correct answer to the question is hyalin. Glucose, cholesterol, and hyaluronic acid do not play the same role in preventing polyspermy in sea urchins.

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.GlucoseCholesterolHyaluronic acidHyalin

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