Both are nucleic acids !
DNA is double stranded and has pentose sugar, phosphate, nitrogenous bases like adenine, guanine,thymine and cytosine !
while RNA is single stranded and same basic structure as DNA but the difference is thymine is absent and uracil is present !
Answer:
a stimulus
Explanation:
https://quizlet.com/113293832/what-is-life-flash-cards/
Biological species are reproductively isolated to keep them from reproducing.
I hope this is the answer you were looking for and that it helps!! :)