It’s B.
Bases to Amino Acids to Proteins to Cells to Tissue to Organs to Organisms
Organisms are a collection of organs, organs are a collection of tissues, tissues are a collection of cells, cells are a collection of proteins, proteins are a collection of amino acids, and amino acids are a collection of bases.
Explanation:
RNA contains the sugar ribose, while DNA contains the slightly different sugar deoxyribose. RNA contains nu leobase uracil while DNA contains thymine.
<span>Scientists found that the cytoplasm of cells undergoing mitosis, if injected into cells at other stages of the cell cycle, could induce the non-dividing cells to start mitosis. This suggested that a chemical signal was present in the cytoplasm of dividing cells that was responsible for "telling" the cells that they should proceed into mitosis. By fractionating the cytoplasm into its components, scientists were able to isolate the signal that triggers mitosis.</span>
They discovered the structure, which is 2 nucleotide chains linked together to form a helix
