Sally is examining some untitled diagrams. one diagram shows a cotyledon, primary leaf, and hypocotyls, whereas the other diagram shows presence of coleoptile, primary leaf, and primary root. what do these diagrams depict?

a. germinating seeds of a dicot and a monocot respectively
b. germinating seeds of monocot and a dicot repectively
c. fertilizing ovules of a manocot and a dicot respectively

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.