Why are the Miller-Urey experiments essential to the theory of evolution? They showed that life can only come from life.

They showed that electricity can create life.

They showed how organic molecules could be made from Earth's early atmosphere.

They showed the role that natural selection played in the evolution of modern day organisms.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

answer-

the statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

solution-

it solely depends on b, whether the function will have one or two or zero x intercept.

this plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e v shape, with vertex translated to (-a, b), instead of origin.

1-   if b is zero, the graph will have exactly one x-intercept, at x= -a

2- if b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- if b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ the statement is sometimes true.