Q. Which of the following statements are correct? I. Relative abundance of carbon and hydrogen with respect to other elements is higher in any living organisms II. Living organisms have more nitrogen and oxygen per unit mass than inanimate objects ($e.g.$, earth crust) III. All the elements present in a sample of earth’s crust are also present in a sample of living tissue IV. Living organisms have more $Ca,\ Mg,\ Na$ in them than inanimate object
A) All of these
B) All except IV
C) Only IV
D) None of these
Explanation
All statements are correct. Only IV is wrong. After performing elemental analysis of a plant tissue, animal tissue, microbial paste (living matter) and of a piece of earth’s crust (animate object), it was found that all living and non-living systems are made-up of same chemicals i.e., elements (e.g., carbon, hydrogen, oxygen and several others) Most living organisms have relatively high abundance of carbon and hydrogen than in earth’s crust
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.