Can anyone plz help fast and with the right answers Biology >

Phosphorus (P) is the element with the atomic number 15. Which of the
following correctly compares 31 and 32p, which are two isotopes of
phosphorus?

A. Both isotopes contain 15 protons.

B. 31P has 30 protons, whereas 32p has 31 protons.

c. 31p has 31 neutrons, whereas 32P has 32 neutrons.

D. Both isotopes contain 17 neutrons.

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Cells destroy body cells infected by a virus or bacteria.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion