<span>When an atom gains or loses an electron it's called an ion. Ions have a net positive or negative electrical charge. If an atom loses electrons, it has a net positive charge . If an atom gains electrons, it has a net negative charge and is known as an anion..</span>
Reproductive isolation must happen
Answer:
<u><em>Hey there the correct answer to this is A Solution</em></u>
Hope it helps! ;)
<span>Cenozoic
</span><span>Mesozoic
</span><span>Paleozoic
</span><span>Precambrian </span>
The nitrogenous base that pairs with Adenine is Thymine.
