Aphylogenetic tree constructed using sequence differences in mitochondrial dna would be most valid for discerning the evolutionary relatedness of: a) chimpanzees and humans. b) sharks and dolphins. c) mosses and ferns. d) archaeans and bacteria. e) fungi and animals.

If you get a map and put the countries a states all together it forms all one piece you can also tell because of the earth quakes

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11

Ther are many reasons.. is it a multiple choice?