Non-constituitive system with visible light energy breaking covalent t-t bonds multiple enzymes may repair an a-c error left unrecognized by dna polymerase catastrophic dna damage caused by ultraviolet light can be survived by the cell with this a "spell check" function by the normal replication enzyme to ensure fidelity thymine dimer-containing section of dna is cut out, resynthesized and sealed
a. proofreading
b. photoreactivation
c. mismatch repair
d. sos repair
e. excision repair

idk im sorry.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.

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.