During the 1800s, seal hunters preferred dark-furred seals from natural seal populations. what effect would best describe what this did to the remaining seal populations over time? stabilizing selection creation of a genetic bottleneck special creation no effect at all

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.