阅读理解，根据短文内容，选择最佳选项。
Life is full of
surprises and you never know how things will turn out.
Sir John Gurdon is a
good example of this. As a boy, he was told he was hopeless at science and
finished bottom of his class. However , the very same Gurdon shared the 2012
Nobel Prize in Medicine with Japanese stem cell (干细胞) researcher Shinya Yamanaka.
Like so many scientists,
Gurdon shows us where the power of curiosity and perseverance (坚持不懈) can lead.
At the age of 15 in
1948, Gurdon ranked last out of the 250 boys at his high school in biology and
every other science subject. Gurdon's high school science teacher even said
that his dream of becoming a scientist was " quite ridiculous".
In spite of his
teacher's criticisms, Gurdon followed his curiosity and kept working hard. He
went to the lab early and left later than anyone else. He experienced thousands
of failures.
"My own belief is
that we will, in the end, understand everything about how cells actually
work," Gurdon said.
In 1962 ,Gurdon took a
cell from an adult frog and moved its genetic( 基因的 ) information into an egg cell . The egg cell then grew into a
clone(克隆) of the adult frog. This technique later
helped to create Dolly the sheep in 1996,the first cloned mammal(哺乳动物) in the world.
In 2006, Gurdon's work
was developed by Yamanaka to show that a sample (样本) of a person's skin can be used to create stem cells. Using the
technique, doctors can repair a patient's heart after a heart attack.
"Luck favors the
prepared mind," Gurdon told the Nobel Prize Organization. "Ninety
percent of the time things don't work ,but when they do ,you have to seize(抓住) the chance. "
