Some globular clusters have three main sequence tracks. This indicates:
A) three different stellar compositions.
B) three episodes of star formation, separated by billions of years.
C) stars evolve through three different mechanisms.
D) the stars were observed from three different telescopes.
Question 2
Compared to optical telescopes, radio telescopes are built large because:
A) they're less expensive to make than optical telescopes.
B) radio photons don't carry much energy.
C) atmospheric turbulence is more of a problem.
D) radio sources are harder to find.
E) radio waves are absorbed by the atmosphere.
DNA Sequence
Model of how direct repeats generated during the insertion of a transposon or an insertion sequence
RNA base sequence of the trp leader region
Two ways of treating blocked coronary arteries, the main cause of heart attacks in older adults.
Origin of replication sequence in E. coli
The lacO region O1 containing an inverted repeat sequence