Which pair of scientists put their ideas together to create the initial cell theory?

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Using meiosis, the sporophyte produces spores that are .