Immature red blood cells produce hemoglobin at their ribosomes.
Ribosomes are small organelles inside cells where proteins are assembled.
This takes place in the red bone marrow found in the flat bones of the skull, pelvis, ribs, etc. Dr. Boris Kondratieff, CSU, explains that the instar of any particular caterpillar can be determined if variable conditions of food and temperature during growth are known. Generally, the width of the head capsule increases in a regular linear progression in successive instars by a ratio that is constant for a given species. Thus, the relative instar can be determined. Dr. Gordon Tomasi, UNC emeritus professor, explains that a single bond is a sigma bond, resulting from the overlap of hybrid orbitals from the two carbons involved.