The front limbs of whales are flippers that help them swim. The fins of fish serve a similar purpose, but fins are not limbs, and their sīructure is different from that of

flippers. Which statement best describes how whale flippers and fish fins are

related?

Select one:

They are homologous structures.

They are analogous structures.

They are both specialized limbs.

They are both vestigial structures.

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.

What is the correct answer for the process of water eroding soil? rills, sheet erosion, gullies sheet erosion, rill, gullies gullies, rills, sheet erosion sheet erosion, gullies, rills

In which of the following relationships is one organism always benefited while the other organism is always harmed