V= df
V= 1.86x10^5
d= 9.2x10^7
1.86x10^5= 9.2x10^7xf
1.86x10^5÷9.2x10^7= f
<span>
1.7x10^13</span>=f<span>
5.8x10^-14=T</span>
I may be wrong.
Answer: Ability to roll the tongue IS NOT heritable.
Explanation:
This particular point is addressed in Adam Rutherford's book "A Brief History of Everyone Who Ever Lived". (I'm going from memory here so someone can correct me if I've got some details wrong): It was thought for a long time that tongue rolling WAS a heritable trait, but studies of identical twins showed that sometimes one twin can do it, while the other can't, which pretty much puts paid to that hypothesis. Apparently even the guy who first posited (or popularised?) the idea that it was heritable, is now embarrassed when he is told that some science classes still teach that it IS heritable.
As for the other 3 - no idea.
During Han Dynasty (206 BC–220 AD), agriculture and trade flourished. One of the longest dynasties of China's history, was considered a golden age where also arts, politics and technology expanded. The <u>Silk road</u> was one of the its major achievements, creating new roads to merchants, and to Europe.
By current research, aboriginal people first came to the north american continent about <span>14,000 to 50,000 years ago.
The other options show either a very short period of time, or a very long period of time. Even though we don't know the exact time when these people came to North America, we can estimate a particular period during which they decided to settle there. </span>
