Study the diagram about the varying pressures of Earth’s Layers. Earth apostrophe s layers. The Crust at depth of 0 kilometers, upper mantle depth 410 kilometers, lower mantle depth 2,900 kilometers at 125 gigapascals, 2,200 degrees Celsius. Outer core depth 5,100 kilometers at 330 gigapascals, 5,000 degrees Celsius. Inner core at 364 gigapascals, 5,500 degrees Celsius.

Which is the best estimated pressure, represented in units of GPa, of the lower mantle?

110 GPa
220 GPa
305 GPa
360 GPa

How does the study of genetic disorders such as pku biologists understand normal alleles?

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.

Why did mendel use pea plants in his experiments? a. they have no alleles. b. they are haploid organisms. c. they reproduce quickly. d. they are all male.