Which of the following statements about the
mass number of an atom is incorrect?
select one:
a. it has a unit defined as a dalton.
b. on earth, it equals the atomic
weight.
c. it equals the number of electrons
in an atom.

on earth it's the atomic weight

they deliver oxygen to the blood

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.