In a nuclear reaction, which of the following does not have to be conserved?
a. mass alone.
b. energy alone.
c. the number of electrons.
d. the combination of mass and energy.

chek all that applys.

A B C. only the mass and the mass equivalent of energy together are conserved.

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.