¿Cuál de los siguientes tipos celulares o células se diferencian o forman células plasmáticas y de memoria?

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.

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

The activity of the modern sample is 1.10 bq . how long does that measurement take?