Before meiosis a cell contains two sets of chromosomes, one set inherited from the mother and one from the father. During meiosis half of the chromosomes go
to one side of the cell and half go to the opposite side. Which chromosomes go
to each side of the cell?

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

its temperature is increasing. this causes molecular vibrations to increase.