In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait.

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.

other information encoded in your genes might distinguish you from the others in the group

i guess because love can be toxic ‍♂️