Base your answer(s) to the following question(s) on the geologic cross section of bedrock shown
below. A through G identify rock layers and Q
represents a fault. Lines W, X, Y, and Z are
locations of unconformities. The rocks have not
been overturned.
Which rock or feature is oldest?

A rock A
B. rock G
C. fault Q
D. unconformity Z

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2

What are the pros and cons of transect sampling?