PH = - log [H+]
Transpose and solve for H+
3 = - log [H+]
H + =

= 0.001 M
Answer: 26 chromosomes.
The diploid number is the number of chromosomes required for two
sets of copies of the organism’s genome ( this is the number of chromosomes in the cells except gametic cells). The organism's genome is represented as n, and the diploid number,as 2n (2 x 13= 26).
Probably very distantly, but sharks are fish, and dolphins are mammals.
The amount of available resources in the ecosystem must change at a predictable rate.