Answer:
i think a. is correct answer (:
hope its help for u
Because most but not all 13 yrs olds and older smoke already and they just want to know if you have already smoked before
Answer:
they all caused by mutations of the X chromosome
Explanation:
trust me! ;)
Answer: A substance is matter which has a specific composition and specific properties. Every pure element is a substance. Every pure compound is a substance. Examples of substances: Iron is an element and hence is also a substance.
Explanation:
