The two words are Genus and Species.
a. chloroplast and cell wall
The chloroplast contains chlorophyll, which is the stuff that makes plants green. So animals do not have a chloroplast. Only plants have a cell wall and it is what helps plants maintain their shape. Hope this helped! :)
The importance is that the second one has more surface area because it has the outside are and the inside area too
The sun gets closer to the earth
