How does this action cause the skateboarder's speed to decrease?
A. It increases the force of friction.
O B. It increases the maximum static friction of the
skateboard.
C. It increases the net force down the hill.
O D. It decreases the force of friction.

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.

Use the distance formula to determine weather each pair of segments have the same length

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates