Define the "two-hit hypothesis" for retinoblastoma. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Not all terms will be used. ResetHelp both copies sporadic retinoblastoma only one copy hereditary retinoblastoma of one gene must be mutated in order for retinoblastoma to develop. This hypothesis was based on the finding that always affected both eyes, whereas only affected one eye.

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

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.

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic