Concept:Cells with high energy demands have many mitochondria, while dead or inactive cells have very few.
Explanation:Mitochondria are the powerhouses of the cell, producing energy for vital activities.
Cardiac cells, bladder muscles, and diaphragm muscles are all living cells that contract continuously and need a large supply of energy.
Therefore, these cells contain numerous mitochondria.
The cornified layer of the skin is composed of dead, flattened keratinized cells.
During keratinization, these cells lose their nuclei and organelles, including mitochondria.
Since they are no longer metabolically active, they have the least number of mitochondria.
Answer:B. Cells of the cornified layer