PLEASE ANSWER ASAP!! Which of the following is most likely to cause the extinction of a species?
O A. genetic variation
O B. mutation
O C. natural selection
O D. a changing environment

changing environment

Explanation:

If the species fails to adapt, it will die off.

D

Explanation:

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )