Aparticular hormone travels by many types of cells in the body. which mechanism ensures that it acts only on the target cells?
a. the dna of the target cells has the same chemical structure as the hormone's dna.
b. the rna of the target cells has the same chemical structure as the hormone's rna.
c. the target cells have the specific receptors for that hormone.

Afor ram b for pats super bowl pick one

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

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.