Aparticular species of fish were split by the formation of the isthmus of panama a long time ago . the fish developed changes in their genes to adapt to the new environment and became two different species. what is this process called ?

allopatric speciation.

Explanation:

correct for plato users

thinking it would be d not too sure but i think it's right

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.