There are two large endocrine glands located in the neck and upper chest region. What is their identity, and what do they regulate? A Thymus: immune system; thyroid: growth and development
B Thyroid: immune system; thymus: growth and development
C Pancreas: blood glucose levels; adrenal: emergency response
D Adrenal: emergency response; pancreas: blood glucose levels

chemical because it warmed up which involves temperature and it bubbled which includes changing

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substitution is the answer in this case

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

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.