The correct answer is 1, tight junctions. Tight junctions are the junctions seal adjacent epithelial cells in a narrow band just beneath their apical surface. They contain a network of claudins and other proteins. They limit the passage of molecules and ions through the space between cells.
I think the correct answer from the choices listed above is option A. DNA contains deoxyribose sugar. DNA stands for deoxyribonucleic acid so it should contain such sugar. It is a molecule that contains genetic material used in organisms and other living things.
A molecular clock is a method used by researchers that uses mutation rates in DNA to estimate the length of time that two species have been evolving independently. This provides evidence of evolutionary descent because it can link to common ancestors.
Light reactions<span> need </span>light<span> to produce organic energy molecules (ATP and NADPH). They are initiated by colored pigments, mainly green colored chlorophylls. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
