Which issue is a negative effect of cell technology on society?

a. immortal animal cell lines can be used to model human cells.
b. the use of human cells in research can lead to ethical problems.
c. organ culture increases the time between donation and transplant.
d. people are more aware of the results of cell technology research.

this protocol provides a detailed procedure for agarose-based ip to purify and enrich the protein of interest.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.