Which of the following is a true statement about acids and bases -an acid has a ph of 7.1 -an acid accord hydrogen ions -a base has ph of 7 -a base gives off hydroxide ions

According to Arrhenius  concept:

An Acid is a substance which gives hydrogen ions (H⁺) when dissolve in water. Examples are HCl (Hydrochloric acid) ,  HNO₃ ( Nitric acid)

                     HCl H⁺ + Cl⁻

A base is a substance which gives hydroxide ions (OH⁻) when dissolved in water. Examples are  NaOH (Sodium hydroxide), KOH (Potassium hydroxide)

                      NaOH Na⁺ + OH⁻

g1

choices:

a. g2. b. g1. c. m

cell division has two checkpoints namely, g1

checkpoint and spindle assembly checkpoint. the checkpoint which determines if

division has properly occurred is the g1 checkpoint. at this point, is a damage

in the dna is detected or  the has not reach the optimum size, the cell is

stopped in g1 and is not allowed to proceed to further process.

source:

answer: 4

explanation: 8