not only in the land but also in the ocean there is food web that is why we can find different spices of creature in the ocean alive 
there are producer consumer and decomposer
u can present by giving example
u can give oration how the organisms are adapted in the water 
 
        
                    
             
        
        
        
A law can be repeated every time while a theory can not a law has more facts and statistics supporting its results while a theory has not been proven and really just cant be trusted as much as a law.
        
                    
             
        
        
        
D. Uracil which is what is use in RNa instead of thymine
        
             
        
        
        
Chromosomes are composed of deoxyribonucleic acid (DNA) mole
There are mainly two molecules that function as genetic material in living organisms.
These are ribonucleic acid(RNA) and deoxyribonucleic acid(DNA).
The organisms having DNA as genetic material require packaging of DNA as it is a long polymer of deoxyribonucleotides.
In the case of human beings, the length of DNA in a cell is approximately 2.2 meters which is very large as compared to the size of the nucleus( approximately 10^-6 meters).
So, the DNA has to be made compact for it to be present inside the nucleus of a cell.
Therefore, the DNA present inside the nucleus of a cell undergoes coiling and compaction through several stages before finally becoming a chromosome, which is shown in the adjoining diagram.
Thus, chromosomes are composed of deoxyribonucleic acid (DNA) molecules.
To know more about "DNA Packaging", refer to the following link:
brainly.com/question/14702559?referrer=searchResults
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