Radiology .

1.) False, the radiation weighting factor is 1.0.

2.) True

3.) If an atom were to gain or lose neutrons it becomes an isotope, so True.

there is no

explanation:

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.