Which of the following describes the inner core of Earth? A
It is loose, primarily composed of silica particles, is under the least amount of pressure, and is between 70 and 200 kilometers thick.

B
It is dense, composed primarily of solid iron, is under the most pressure with the highest temperatures, and is 1250 kilometers thick.

C
It is solid, made up of magnesium and iron, has the lowest temperatures of any layer, and is 2900 kilometers thick.

D
It is made up of mainly of silicon and aluminum, has moderate temperatures, and is only 200 kilometers thick.

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.

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.