<span>I am a Carbon atom and I took birth in the air. I had spend a memorable time in a molecule and there were two very nice oxygen atoms too. I just got into the air and I am very excited that I had my complete incoming box of electrons. I am a carbon atom and I have six electrons. Right now I am in a carbon dioxide molecule and I am just wondering in air. While i was enjoying my journey I waved to my friends like oxygen gas which is a molecule of two oxygen atoms.Oxygen atom is my best friend. I’ve heard stories of becoming solids and many different things when i was too young, but now I just like the air and I am loving it.</span>
Guanine and adenine, structure-wise, are purines.
Answer:
B. CO2 reacts so quickly with other compounds that it should not be occurring.
Explanation:
CO2 concentrations globally have increased significantly due to increased anthropogenic activities of burning, increased emissions from industrial hubs around the globe and other contributing human activities. Burning of fossil fuels, coal and liquified natural gas releases greenhouse gases, GHGs to the atmosphere and water bodies. It has been estimated recently that CO2 rise at 2.4 parts per million.
Missing options in the question:
the gene that controls the production of stem cells
the gene that controls the production of skin cells
the gene that controls the production of red blood cells
the gene that controls the production of cardiac cells
Answer:
B. the gene that controls the production of skin cells
Explanation:
Superficial scrapes are the damages of upper skin layers which could occur due to accidents or sunburning. Upon damaging, body sheds the skin cells and then replaces with new cells. This process thus is governed by the expression of skin related genes.
