1. From which period is a rock at +2.7 m depth? A. Paleogene
B. Cretaceous

2. What is the average iridium content of rock 0.5 m below the K–Pg boundary layer?

A. 0.25 ppb
B. 0.30 ppb
C. 0.36 ppb
D. 41.6 ppb

3. How much more iridium was found in the K–Pg boundary layer than in rock 0.5 m below it?

A. 41.35 ppb
B. 41.60 ppb
C. 41.24 ppb
D. 39.62 ppb

this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.

the answer is trees if i'm not mistaken

archaebacteria are found in in forest soil.

hope i spelled it right lol

hope i

-lavira: )

satellites are frequently used to make observations of the orbit on earth