Answer:
D. A nitrogen base has been added to the DNA molecule.
Explanation:
You can see that the sequence for the nitrogen bases are in the exact same order after the exposure, this rules out A. You can count how many bases there are, 7 before and 8 after so it cannot be B. Lastly, given that they are in the same order as were before and that a base has been added, you can see that no bases were replaced (so not C) and that D is your answer.
I think it’s c bc it say one way to make the earths coal supply last longer and you can build and use solar power plants
<span>Answer: Smooth Endoplasmic Reticulum
Hope I helped</span>
There is no picture for me to know what part is labeled b
Ethanol produced from bioenergy starts with starch produced by corn and sugar cane :)
