Boys shoulders broaden and voice deepen, Girls start having menstrual periods and develop breast. <span />
Answer:
No
Explanation:
Only what state it is in, soild, liquid or gas. Particals never change duering this.
If about 30% is A then 30% is T. That leaves 40% to be G + C...so each must be around 20%.
They form when lava cools above the earths rocks. Hope I helped and You're Welcome.
