Cells, tissues, organs, organ systems, organisms
A gene map of the human genome
Answer:
Actually, The reaction is chemical and endothermic. Chemicals A and B form an endothermic reaction, and chemicals C and D form an exothermic reaction. Therefore, chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Explanation:
Answer:
A
Explanation:
A meteor is a rock falling from the galaxy and usaully is burning because of the atmosphere.