Answer:
Ions are an atom or group of atoms that either has a positive or negative charge. An ion with a negative charge is called an anion and one with a positive charge is a cation.
Hope this helps :)
Answer:
<h3>The genes that caused scales to become feathers in the early ancestors of birds </h3>
I pretty sure it is because the earth is bigger than the moon
I can answer the third one:
Photosynthesis takes place in two stages<span>: light-dependent reactions and the Calvin cycle (light-independent reactions).</span>
<span>The lowest quantity of energy that the reacting species must possess in order to undergo a specified reaction.</span>
