Gold prices dropped exponentially in Northern Africa
Answer:
1. Paper Making
+ The Han dynasty Chinese court official Cai Lun
+ Ts'ai Lun presented paper making to Emperor Hedi
+ Yes
2. Silk
+ the wife of the Yellow Emperor , Leizu, around the year 2696 BC
+ a silk cocoon was found cut in half by a sharp knife, dating back to between 4000 and 3000 BC
+ Yes
3. Tea Production
+ Emperor Shen Nung
+ Emperor Shen Nung discovered tea when leaves from a wild tree blew into his pot of boiling water. He was immediately interested in the pleasant scent of the resulting brew, and drank some.
+ Yes
Explanation:
I researched.
Yes, you are correct about change of water into water vapours , also you will think it is doesn't have any importance and is waste for the plant energy. But it is a “NECESSARY EVIL” as it cools down the plant , transport water,minerals and also Plant hormones,etc. May you got your answer
The severe recession that began in December of 2007 was caused by the bursting of the housing bubble and the re- sulting credit crisis.
