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The isotopes are all stable, while
is radioactive. The mode of decay for
is most likely to be
Cartilaginous Fishes
Fish that have skeletons made entirely of cartilage, such as sharks and rays.
Bony Fishes
Fish that have skeletons primarily made of bone, as opposed to cartilaginous fishes, which have skeletons made of cartilage.
Keel Of The Sternum
The central ridge or projection on the sternum (breastbone) that resembles the keel of a boat, more prominent in some animals like birds for attachment of flight muscles.
Hollow
Having a space or cavity inside; not solid.
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