The two strands of the DNA double helix are held together by bonds between base pairs. I DNA replication, each strand of DNA serves as a for a newly synthesized strand of DNA. In gene expression, DNA is used as a template to make , which is then used as a template to make a polypeptide. In the process of , DNA can be rearranged, which contributes to the genetic diversity of the species. What are the differences between the structures of DNA and RNA?
How can the central dogma help us understand the process by which DNA is turned into protein? What are the two steps involved in the process of gene expression?
Why are replication and recombination two important roles of DNA?

c is the answer to this question. altitude affects the weather because air molecules evaporate.

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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.