Question

Yellow bone marrow are found specifically in the bone marrow of
(a)Long bones
(b)Spongy bones
(c)Short bones
(d)All of the above

Answer 1

Hint: Yellow bone marrow is gradually derived from the red bone marrow as we mature. These are found in specific bones of our body and store fat inside them that acts as the vast reservoir of energy in hunger.

Complete answer:
Yellow bone marrows are found mainly in the central cavities of the long bones and stay surrounded by layers of red bone marrow within a reticular framework. These mainly act as a storage of fats and help to maintain the correct Environment for the bones to function. One special situation like severe blood loss, these tend to revert to red bone marrow in order to produce blood cells.

Additional Information: Bone marrows are semi-fluid tissues that are mainly found in the cancellous portions of human bones. These are formed of hematopoietic cells, adipose tissue, and supportive stromal cells. The bone marrow is the main producer of blood cells and the yield is almost 500 billion cells daily. The hematopoietic stem cells produce all the three blood cells found in human blood.
There are mainly two types of human bone marrow- red bone marrow and yellow bone marrow. The red bone marrow is found abundantly in newborn babies which turns to yellow bone marrow gradually as the person gets mature. These are found in the pelvic bones, ribs, cranium, sternum, vertebrae, and epiphyseal ends of long bones. Red Bone marrow is critical in the production of blood cells.
Yellow bone marrow is located in flat and long bones of the hip, skull, ribs, and vertebrae. These are the yellow-colored tissue that stores fats and also produce blood cells. The yellow color of these bone marrows is due to the presence of carotenoid in the tissue's fat droplets.
In special conditions where blood is lost, it converts into red bone marrow in order to facilitate the production of blood cells. The fat stored in the yellow bone marrow has a significant role in the emergency reserve of energy and it can also convert into cartilage and bone when it's necessary.
Therefore the correct answer is “Long bones”.

Note: The fat present in the yellow bone marrow is stored in the cells known as adipocytes that can be used as the last source of energy during hunger. This type of bone marrow contains mesenchymal stem cells which in necessary conditions, can develop into bone or fat, or even muscle cells. As with age red bone marrow converts into yellow bone marrow, therefore a grown-up person's most bones have yellow bone marrow in them.