The part of the plant which is likely to suffered damage must be root.
Explanation:
Because root play an important role in plant's growth as it absorb water and minerals and transport them to stem. They also anchor and support plant and store food. When root will damage then plant can no longer grow and produce no new root cells.
Mitochondria are considered as the powerhouse of cell because they perform function cellular respiration process in a cell.
Cellular respiration is a process of converting the chemical energy present in nutrients into ATP which gives energy to organisms to carry out movement and physical actions.
Mitochondria performs cellular respiration process from which they can release energy present in food and nutrients.
Due to those reasons, mitochondria is called as powerhouse of cell.
