Which of the following contains the base Uracil? Question 1 options:

A. RNA

B. DNA

C. neither DNA or RNA

D. both DNA and RNA

Both RNA and DNA

Explanation:

i took college physics (im 14 btw)

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this