- Life Sciences
an informal term for any living species which appears to be the same as a species otherwise only known from fossils and which has no close living relatives. These species have all survived major extinction events. The coelacanth is an example of a living fossil.
a non-membrane bound structure made of proteins and nucleic acids that occurs within the nucleus...
small fluid-filled sacs that store, transport, or digest cellular products and waste.
tough cartilage that acts as a shock absorber between vertebrae and at the ends of bones in ball...