An egg is protected by its outer shell. however, the shell also allows moisture and air to pass through. which cell structure performs a similar function?
a: cell membrane
b: cytoplasm
c: nucleus
d: vacuole

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

Which characteristics are typical of a human population in the postindustrial stage?

Clara wrote the following hypothesis for an experiment about acidophilic bacteria. bacteria cells will stop dividing in a basic (alkaline) environment because of the high ph. which statement is the best way to restate the hypothesis so that it is more specific? growing acidophilic bacteria in some environments will cause the cells to stop dividing because of ph. if the ph of their environment is changed, acidophilic bacterial cell division will be affected. if the environment of acidophilic bacterial cells becomes alkaline, the bacteria will stop dividing. the more alkaline an environment, the less cell division will occur in bacteria.