It took 1649 years for the world population to double, going from .25 billion people to .50 billion people. how long did it take for the population too double once again

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

The endoplasmic reticulum (er) is an organelle in some cells. in these cells, it is continuous with the nuclear membrane and forms a large part of the cell\'s total membrane. sort the phrases below as describing rough er, smooth er, both, or neither. note: if you answer any part of this question incorrectly, a single red x will appear indicating that one or more of the phrases are sorted incorrectly.1) found in prokaryites and uekaryotys2) involved in protein synthesis3) involve in lipid synthesis4) contains molecular chaperones in lumen5) bound with ribosomes6) involved in toxin or drug metabolism7) large systemot internnected tubules, vesicles, and sacs8) "packages" enzymes in vesicles for secretion.

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism