Answer:
Vestigial structures
Explanation:
Vestigial structures serve little or no purpose for an organism. An example being the human tailbone which at one point might have been a tail, but serves no real purpose now since we're bipedal organisms
I think you forgot to give the options along with the question. I am answering the question based on my knowledge. Appalachian mountain range is well known for providing coal, copper and iron. Any of these choices can be your answer. Coal is actually the most abundant. I hope that the answer helps you.
Answer:
The similarities and differences between DNA and RNA are given as follows:
Explanation:
Similarities:
Both are made up of nucleotides
Nucleotides are made up of nitrogenous bases, a pentose sugar, and the phosphate backbone.
Both DNA and RNA have four nitrogenous bases each - two purines two pyrimidines
Purine binds with pyrimidines
Differences
DNA uses the nitrogenous bases adenine, cytosine, thymine, and guanine whereas RNA uses adenine, cytosine, uracil, and guanine. Uracil lacks a methyl group on its ring
RNA contains the sugar ribose that has an extra -OH while DNA contains the deoxyribose sugar that has H at the 2 carbon.
DNA is double-stranded while RNA is a single-stranded
Under alkaline conditions, DNA is stable while RNA is not stable.