Since a secondary source is a source written after an event has occurred, I want to say that the answer is A. Hope this helped!<span />
Explanation: XX because she is female. Since she is not color blind one of the pair has to be XC. Since she is a carrier of color blindness she has to have the recessive gene as well, so the other has to be Xc.
Energy input is required as it is the activation energy needed for a reaction to start.
I don't see anything but I know that what you might be talking about goes like this...
Domain, Kingdom, Phylum, Class. Order, Family, Genus, species.
Hope this helped!
Answer:
Mocous cell
Explanation:
literally, stomach have chief cell (zymogenic), parietal cell and mocous cell
