Number of neutrons.
Since the definition for isotopes is--Atoms of the same element having the same number of protons but different number of neutrons.
Answer:
C. Some marsupial mole rats had a natural immunity to the virus.
Explanation:
According to Darwin's evolutionary theory, over time some of marsupial moles may have acquired natural immunity which evolves as an adaptive trait in the population. Since these organisms have more chance to survive and reproduce (survival of the fittest), they will likely transmit the natural immunity to the next generation
.
Answer:
a controls what enters and leaves the cell
Explanation:
