If ctenophores are sister to all animal taxa, excluding cnidarians and placazoans, then: (Select all that apply.)a) ancestral sponges exhibited morphologic complexity seen in other Eumetazoans. b) the anatomical complexity of ctenophores arose independently of what is found in other Eumetazoan groups. c) the nervous system of ctenophores evolved independently of other animals. d) radial symmetry was lost in placazoans. e) None of the answer options is correct.

What is called the "building block" of life?

Which symbols below represent the ions found in the glass of water ? a. oh- and h+ b. co2 and o2 c. o2 and h2 d. nh3- and h+

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.