Why or why not? -Why is water necessary for life?
What was the probability distribution of their values, and what was necessary for "life"?
The result gave scientists their first glimpse into the set of genes necessary for life.
Alone, this may not be serious; in some heart malformations it is even necessary for life.
Particularly important are those cellular proteins called enzymes, which catalyze the chemical reactions necessary for life.
Based on the only known example, earth, liquid water seems to be necessary for life.
"A celebrity chef is not necessary for life thereafter," he said.
Due to its non-reactivity and insolubility, iridium is neither necessary for life nor is it toxic.
The 17th century Dutch astronomer Christiaan Huygens speculated in his book Cosmotheoros about the conditions necessary for life.
Ours happens to have the forces and structure necessary for life and that is all that can be said.
The mission set out to determine whether comets brought water and the organic, carbon-rich molecules necessary for life to Earth.
