Chromatin from two tissues, skin and liver, was extracted and analyzed near the gene twist. the liver chromatin was found to be more dnase sensitive than the chromatin from skin cells. what might explain this difference?

(a) chromatin near twist in liver cells is heterochromaitic.
(b) twist is not expressed in either liver or skin cells
(c) twist is silenced in skin and not liver.
(d) twist is expressed at the same level in both liver and skin cells.
(e) twist is expressed in skin and not liver

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. label the following topographic map. click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (increments for contour lines is 50 ft).

What happens when water’s salinity increases? mass decreases. freezing point decreases. buoyancy of objects decreases. the amount of dissolved minerals decreases.

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)