5 Drag the tiles to the correct boxes to complete the pairs. Match the terms with their definitions. ​

a sequence of DNA responsible for coding a protein = gene

The complex range of alleles an organism carries for... = genotype

an allele that determines... = dominant gene

the observable characteristics= phenotype

what's the question?

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.