During the 1900s, the following genetic discoveries were made: • DNA is the molecule responsible for inheritance.
• There are four bases in DNA, and they combine in a specific way. Adenine pairs with thymine, and guanine pairs with
cytosine.
• DNA is a double helix. The sugar molecules form the backbone, and the bases are connected by hydrogen bonds in the
middle.
• Enzymes that can cut and copy sections of DNA are identified and isolated.
As a result of these scientific discoveries, scientists are now able to

A.
determine some organisms' genetic sequences.
B.
change portions of genetic code to treat disease.
C.
clone certain organisms.
D.
all of these

the answer to your question is slate

it should be briana that has it to me

the answer is d p: cell, q: organ, r: organ system, s: tissue

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.