How can you determine the relative age of strata in a bed of rock?

a. darker colored layers are older.
b. younger layers cover older layers.
c. layers that have fossils are generally older.
d. each layer represents about one million years.

Anurse is preparing to administer ampicillin 500 mg in 50 ml of dextrose 5% in water (d5w) to infuse over 15 min. the drop factor of the manual iv tubing is 10 gtt/ml. the nurse should set the manual iv infusion to deliver how many gtt/min? (round the answer to the nearest whole number. use a leading zero if it applies. do not use a trailing zero.)

If the rna molecule in a human has the nucleotide sequence of guu, this would the amino acid valine would be needed to make the protein. how would this cha process was occurring in a mushroom?

What does the number 18.9984 represent in the image?