Scientists have created trains that use magnets to make the trains float above the tracks as they travel. the trains float because
a. the track is waxed
b. the like poles repel
c. the train has a low density
d. a chemical change occurs

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.