Why doesn't the periosteum cover the articular cartilage of a long bone

What happened to rosalind franklin in 1956?

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.