The correct answer will be C. Carbon and Oxygen because these both are non metals and non metals react colvalently (i.e share electrons) while when metals react with a non metals they react ionically (i.e lose and gain electrons)
<span>Hello @Malikjawadarshad,
"the chemistry of carbon compounds (other than simple salts such as carbonates, oxides, and carbides)." This is the Literal Definition of Organic Chemistry, So I hope it helps. What you need to do, in this case, is state this definition, and everything you have learned to make a "Personal Definition" written by you. Do you get it? I hope so, and if not, contact me!
Thank you,
Darian D. </span>
Answer:
The lungs and respiratory system allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out. When you breathe in, the diaphragm moves downward toward the abdomen, and the rib muscles pull the ribs upward and outward.
Explanation:
Unicellular organisms, cells perform all the basic actions and functions required for living like nutrition, respiration, reproduction etc.
In multicellular organisms, cells divide their tasks on the basis of "DIVISION OF LABOUR" to specialize in certain functions besides respiration etc. Like conduction in neurons, excitation in muscles, RBC production by bone marrow etc.
