Answer:
When any living organism gets thrown off balance, its body or cells help it return to normal. In other words, living organisms have the ability to keep a stable internal environment. Maintaining a balance inside the body or cells of organisms is known as homeostasis. mark me as the brainliest
Explanation:
 
        
             
        
        
        
Answer:
Nitrogenous bases have two distinct families known as purines and pyrimidine, nitrogenous are the building blocks or monomer units of the nucleic acids.
The major and significant difference between purines and pyrimidines is the difference in their structures- 
The purines are divided into two different bases called adenine and guanine and each of them have a two-ringed structure formed with a 9-membered molecule and 4 nitrogen atoms which makes it a large in size than purines.
The pyrimidines are divided into 3 bases that are cytosine, uracil, and thymine and all these have only one single ring of six members and 2 nitrogen atoms.  These are smaller in size.
 
        
             
        
        
        
The mirror neurons were first discovered on monkeys, and they were tested with fMRI (functional Magnetic Resonance Imaging) - so the correct answer is "MRI “monkey see monkey do” tests on monkeys performing tasks". This means that an MRI scan was performed as the monkeys watched people perform tasks. 
        
             
        
        
        
TO FIND THIS YOU WILL JUST HAVE TO DO 40-30/12
ANSWER IS 37.5