What conclusion can you draw from the data? a. all rhizobium strains have a similar, highly positive effect on plant growth. b. some rhizobium strains are much more effective at promoting plant growth than other strains; the most ineffective strains have little positive effect. c. some rhizobium strains are much more effective at promoting plant growth than other strains; however, even the most ineffective strains have a significant positive effect. d. none of the rhizobium strains used in the study have a substantial positive effect in promoting plant growth.

One of the newest applications of cell technology is called cybrid embryos. this process involves replacing the nuclear material of an animal cell with human nuclear material. how might this process affect public policies about research by using stem cells? the same policies and concerns about the use of human embryonic stem cells would most likely apply. the embryos would most likely be treated like traditional animal embryos and regulated accordingly. the process of forming cybrid embryos would most likely be banned by government regulators. the embryos would be treated as regular cells because they are not fully human in origin.