Sand and gravel are staples of the construction industry.

what process is involved in the distribution of these materials?

a)
a biological process
b)
igneous
c)
a sedimentary process
d)
weathering

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.

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?

Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?