Question 19 What is an advantage of a nuclear-fission reactor?
А
The nuclear waste generated has a very long half-life.
B
The products of fission reactions are often radioactive isotopes.
С
The power plants are only expensive if they require radiation shielding.
D
A large amount of energy can be produced from a small amount of uranium.

List two modern organisms that have pentameral symmetry

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

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.