Hey guys could you help me??? Which of the following is NOT a difference between RNA and DNA in human cells?
A.
RNA is single stranded and DNA is double stranded.
B.
DNA is helical and RNA is not.
C.
The nitrogenous bases of RNA are never hydrogen-bonded to other bases.
D.
none of the above

C.

Explanation:

because RNA is single stranded and no pairing of bases occur

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

well, you see. the answer to your question is quite simple. the thing that is big, powerful, and over 9,000 is your mom.