<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>
I am carbon atom denoted by a symbol C and my atomic number is 6. I am the member of group 14 in the periodic table. I am tetravalent having 4 electrons to form covalent chemical bond with other atoms. I live in air along with two molecules of oxygen as carbon dioxide(CO₂).
Fixation: algea and terrestrial green plants take me as carbon dioxide from the external environment and convert me into polysacchride as their food in the process of photosynthesis.
Respiration: the consumers obtain the food prepared by the plants and obtain energy from it and again release me in the form of carbon dioxide.
Decomposition: in the decomposition process the animal, plant and human dead and decaying waste is converted from highly complex molecules to less complex molecules, i get produced along with two oxygen molecules (CO₂) in this process.
Fossil fuels: burning of fossil fuels like coal and petroleum leads to again my release as CO₂.
Answer - B Fish and reptiles both are ectothermic but fish have gills and reptiles have lungs. Ectothermic organisms do not have an internal mechanism of regulating their body temperature and are dependent on their atmosphere for temperature regulation. Fish, reptiles and invertebrates are examples of ectothermic organisms.
