Which characteristics of bones is often very different from one individual to another
a. the number of bones
b. the cellular make up of the bones
c. the size of the bones
d. the composition of the bones

What are some possible short and long term medical concerns for crew members on longer space exploration trips

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.

Nh3 +02-no + h20 is unbalanced what is the balanced equation