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

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.