Question

question 6
choose all of the correct statements about the formation and role of somites during development.
□ somites signal adjacent cells to form ossification centers, which eventually grow bone to form vertebrae and ribs
□ somites are ectoderm cells, so they will form teeth, jaws, and skin
□ somites will directly turn into the neural tube (spinal cord)
□ somites are formed when the notochord signals adjacent mesoderm cells

Explanation:

Somites are formed from mesoderm cells signaled by the notochord. They signal adjacent cells to form ossification centers for vertebrae and ribs. They are not ectoderm - derived and do not directly form the neural tube.

Answer:

Somites signal adjacent cells to form ossification centers, which eventually grow bone to form vertebrae and ribs.
Somites are formed when the notochord signals adjacent mesoderm cells.