Some invertebrates in Antarctica have which compound in their blood to help protect against the cold

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Accepted Answer

The correct answer is glycerol. This is what animals like seals have. It's basically a bunch of fat tissue that is found under the skin in large quantities to isolate the body and protect it from the immense cold. Seals aren't the only ones as there are many animals in the polar regions who have it.

Suggested Answer

 the correct answer is glycerol.