One of the hazards of nuclear explosions is the generation of 90sr andits subsequent incorporation in place of calcium in bones. this nuclide emitsβrays of energy 0.55 mev, and has a half-life of 28.1 y. suppose 1.00 μg wasabsorbed by a newly born child. how much will remain after (a) 18 y, (b) 70 yif none is lost metabolically?

Select the correct answer from each drop-down menu. daniel and sanya are scientists. daniel is studying whether the increasing frequency of tropical storms is affecting coastal erosion. sanya is investigating whether the discharge from industrial plants has any impact on the ph concentration of freshwater swamps in the surrounding area. which fields of science are daniel’s and sanya’s studies most closely related to? daniel’s field of study is related to science, and sanya’s field of study is related to .

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles