The mass number minus the atomic number is A. the number of protons
B. zero
C. the number of neutrons
D. the total number of things in the nucleus

Plz ! ive been stuck on this forever

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla

Which is one example of a phenotypic change that is not genetic