Answer:
its the uracil
Explanation:
the four nitrogen bases in dna are adenine, guanine, thymine, and cystosine. In rna, thymine is imply replaced with uracil
C no because many species went extinct without leaving fossils behind
Answer:
False
Explanation:
A theory can be proven just the same as a hypothesis can.
Hope this helps!
Staying awake for days in a row will cause a person to become less alert and maybe even less aware of their surroundings.
