Geologists can use waves to learn about earth's interior. p waves travel faster than s waves. s waves travel through solids only, which tells geologists that the core is liquid. geologists call the outer, solid area of earth the crust; the next layer is the . finally, at the very center, is the core.

Blood, made up of red and white blood cells, work together to form

Which statement about dna replication is true? a. eukaryotes only have one circular chromosome that unwinds at multiple locations. b. eukaryotes can only replicate one segment of a chromosome at a time. c. prokaryotes can only replicate their single circular chromosome in the nucleus. d. prokaryotes only have one origin of replication to initiate replication.

What is the inability of an individual or a society to achieve a minimum standard of living known as ?