Which organelle is the powerhouse of the cell, the site of cellular respiration?

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]