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.
The difference between Meristematic Tissue and Permanent Tissue are:
Meristematic tissue always has a prominent nucleus. Permanent tissue has a prominent nucleus in some like parenchyma while not in others like sclerenchyma.
Meristematic tissue has cells small in size and isodiametric in shape. Permanent tissue has cells large in size and their shape varies.
