Question

All isotopes have half lives 1) True 2) False Ammonification is defined as: 1) Uptake of ammonium by plants, bacteria, followed by conversion to organic matter 2) Breakdown of organic matter to release ammonium O 3) Bacterial oxidation of ammonium to nitrate 4) Anaerobic bacteria convert N2 into ammonium The Universal Tree of life suggests that organisms can be divided into 1) three main categories 2) RNA and DNA 3) one main category 4) two main categories

Answer 1

• All isotopes have half lives but stable element’s isotopes have a very slow decay rate and will have very very long half life and therefore the statement is true.
• Ammonification is the process in the nitrogen that is associated with organic matter gets breakdown by the action of bacteria to release ammonium also known as ammonium ion and hence the correct option is second option.
• As per the Universal tree of life the organisms can be divided into three categories and therefore the correct option is first option.