After collecting specimens from many ares of the world Darwin noticed some similarities in them.
DNA is a polymer that contains deoxyribose and a phosphate backbone. It contains these 4 nitrogenous bases: Adenine, Guanine, Cytosine and Thymine.
RNA on the other hand is a polymer that contains ribose and phosphate backbone. It contains 4 nitrogenous bases of: Adenine, Guanine, Cytosine and Uracil.
Hope that helps a bit.
Root systems in the soil branch out in the soil forming a mesh-like framework that prevents soil erosion by enhancing soil stability. Fine roots may improve soil permeability to water. This can be illustrated when, for instance, you pull a small plant out of the soil, some soil will cling to the roots.
<span>The electron transport chain is, in essence , aseries of redox reactions that conclude cellular respiration. during these redox reactions, NAD+ is reduced,which then oxidizes an electron acceptor in the electron transport chain.</span>
