you can compare that too a gynm
the mitochondria is the vital activities of the cell while plastids are manufacture in food photosynthesis.
mitochondria was a power house of the cells and chloroplast is the green thing that make the photosynthesis
You can compare it to a powerhouse because it is known as the powerhouse of the cell.
It means: * Calculate the density of an object * Calculate the density of its pieces * Compare
Mitochondra have a universal function.It is to produce energy.
It's identical. (assuming that the object is homogeneous)
brain
brain
Spiral staircase
hala
The fact is that it always is ... in relation to something. For an object to be at "rest" there must be a second object to compare it with.