How is the cell in diagram b effectively using its resources?

a) the cell continually produces the enzymes needed to break down lactose.

b) since lactose is absent, the repressor protein is blocking the genes and stopping transcription.

c) rna polymerase is transcribing the genes since lactose is present.

d) since lactose is present, the repressor protein will begin transcription

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+

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).

Agenus is a taxonomic grouping that identifies a collection of species. when a scientist discovers a new species, how is this species assigned to a genus