Q: What is the modern periodic table based on? Choices: - element mass - metallic number - element density - atomic number A:
atomic number

Q: When does coal release most of its energy? Choices: - when forming - when compressed - when falling - when burning A:
when burning

Q: What increases the chances of someone inheriting a mitochondrial disease? Choices: - presence of defect transgenic and defect mtdna - presence of defect transgenic and undefected mtdna - presence of defect ornithopods and undefected mtdna - presence of defect mtdna and undefected mtdna A:
presence of defect mtdna and undefected mtdna