Question 18(Multiple Choice Worth 4 points) (01.03 MC)

It is hypothesized that RNA may have evolved before DNA because RNA molecules

A

were the first molecules synthesized by Miller and Urey

B

are more important to genetic inheritance than DNA

C

can catalyze a variety of biologically important reactions

D

are found in more modern cells than are DNA molecules

Liquid water turns into water vapor at which step in the water cycle? a. precipitation o b. water run off c. evaporation d. condensation

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).

Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geological equipment to analyze the composition of rock?