Which of the following could be said about ecological footprints?
a. ecological footprints don't take into account resources needed to absorb and manage wastes.
b. exact ecological footprints are often difficult to calculate, but estimates can be useful in comparing populations.
c. the average ecological footprints for various countries are nearly identical.
d. ecological footprints can't be used to determine carrying capacity.

The body is protected against harmful flu viruses by

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.

Which describes a grizzly bear’s habitat?