why is the linner wall of alimantary canal not digisteg although the digestive enzymes can digest all the materials that make cell

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a. both make it possible for the conditions in the interior to be different from the conditions outside. b. both provide a barrier that keeps water from flowing across it so the interior remains dry. c. both separate the rna that forms in the interior from any rna that might form in the environment. d. both can actively move molecules into the interior or out into the surrounding environment.

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

The activity of the modern sample is 1.10 bq . how long does that measurement take?