Final answer:
The estimated mass and volume of the oldest and simplest eukaryotic fossils vary, the distinguishing characteristic between multicellular organisms and organisms living in mats or biofilms is thallate multicellular structure, the geological epoch referenced is Mesoproterozoic, the question was likely inspired by Figure 2.1 in Walter Alvarez's book, DNA is preferred over RNA as genetic material because it provides information security, and the presence of a hydroxyl group distinguishes RNA from DNA.
Step-by-step explanation:
The oldest and simplest eukaryotic fossils are estimated to have a mass and volume that can vary. Based on the given options, the most accurate answer would be b. Mass: Not specified, Volume: Up to 2 mm.The characteristic that is essential for differentiating between multicellular organisms and organisms living in mats or biofilms is d. Thallate multicellular structure. Multicellular organisms have specialized structures that allow for cell differentiation and coordination of functions.The geological epoch referenced in the question about the typical animal with radial symmetry is a. Mesoproterozoic.
The Mesoproterozoic era spans from 1,600 to 1,000 million years ago.The question about ancestral multicellular organisms and radial symmetry may have been inspired by information from various sources, but the most relevant one would be option a. Figure 2.1 in Walter Alvarez's book.The primary reason for DNA being preferred over RNA as genetic material is c. DNA provides information security. DNA is more stable and less prone to mutations compared to RNA.The structural feature that distinguishes RNA from DNA is the c. Presence of hydroxyl group in RNA. DNA has a hydrogen atom instead of a hydroxyl group at the 2' carbon.