A magnesium atom undergoes a chemical reaction in which it becomes an ion with charge 2+. This means that the atom has
changed by
A.
losing two electrons, two protons, and two neutrons
B.
gaining two protons
C.
losing two electrons
D.
losing two electrons and two neutrons
E. losing two neutrons and gaining two protons
Reset
Submit

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.