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

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.

This is what i found “getting into the technicalities, the continental crust has a density of around 3.0 g/cm3 compared to 2.6 g/cm3 of the continental crust. in addition, the continental crust is much thicker than the oceanic crust. the recycling process does not happen to the continental layer.” i hope this you for what your looking for. can you plz mark me brainliest?