In their experiment to form a primitive living cell, urey and miller set up various flasks with water vapor and the gases co2, ch4, and h2. one flask also had electrodes to generate spark; another flask had everything but electrodes. which of the flasks showed presence of coacervates, and why?

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

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.