Ionic, Covalent, and Molecular I'm sorry if I got this wrong but I think this is right because molecular is an example of covalent
Peces, algunos anfibios, moluscos, artrópodos, gusanos
The nitrogenous bases in DNA are adenine, guanine, thymine, and cytosine.
The nitrogenous bases in RNA are adenine, guanine, uracil, and cytosine.
So the base in RNA that is different than in DNA is uracil.
Hope this helps.
I am thinking D. But I am not sure that it is the answer.
Answer:
Mutations Are Recessive or Dominant