A200- gram sample of a radioactive nuclide is left to decay for 30 hours. at the end of 30 hours only a 100 g of the sample is left. what is the half life of the nuclide sample

Which mechanism of transport takes place when solute particles move from a region of high concentration to a region of low concentration? active diffusion isotonic osmosis

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.