Which of the following is a population?

all the animals in a prairie ecosystem.
all the mesquite trees in a desert ecosystem.
all the living organisms in a river ecosystem.
the tree where a squirrel lives in a forest ecosystem.

Which of the following systems in absorbing oxygen and releases carbon dioxide

What are the types of mutations, and how does each alter the encoded protein? college level answer

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.