<span><span>A. </span><span>Fats would be the correct answer. For an organism to have energy, fats are burned when the cell diet does not consist of the fat needed from the food intake. Fats are necessary in order to transport other nutrients. Some vitamins are even fat soluble which means they need fats in order to be transported. Such vitamins are A, D, E, and K. Fats also provide protection for the vital organs from pressure and change in temperature by providing proper insulation and cushion. It also helps regulate body temperature.</span></span>
More recently, stem cells from the blood stream (called peripheral blood stem cells) and umbilical cord stem cells have been used to treat some of the same blood-based diseases.
The correct answer is: D, a decreased number of oxygen-rich mitochondria.
During the embryonic period, the embryo develops according to the proximodistal principle, which means that the embryo develops the center of the body before other parts are developed.
The embryo which undergo various degree of development in the womb. The embryo begins in the center of the body which houses a lot of important organs such as the heart , liver, kidney etc.
These organs require a very well defined and special development which is why development starts from this part.
The trunk of the body such as the hand and legs are developed after the center parts of the embryo is developed.
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