When there is insufficient research to determine the rda for a nutrient, the based on estimates of intakes that appear to maintain a defined nutritional state in a specific life stage?

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.

Solutions to environmental problems in europe must

What characteristic make legumes a good food source for food insecure populations