Answer:
it is a substance and it is a liquid
When the vesicle fuses with the membrane of the cell, it releases its contents which is called exocytosis. The reverse is endocytosis.
Answer:Gravity is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915), which describes gravity not as a force, but as a consequence of the curvature of spacetime caused by the uneven distribution of mass.
Explanation: