Answer:
Ionizing radiation comes from these main sources:
Nuclear reactions in the Earth's sun and stars in space.
Radioactive decay in the body's tissues and in the soil.
Radioactive decay of unstable elements in rocks, especially rocks that contain radium and release radon gas.
Other examples of ionizing radiation include alpha, beta, and gamma rays from radioactive decay.
B) The positive charge of the protons in the nucleus equals the negative charge in the electron cloud.
(I just took the test and it was right). :)
Answer:
that sounds like any other skeletal structure
Explanation:
humans
B. The maximum number of a population that an ecosystem can sustain.
