Immediately above the sun's photosphere is the blank which is the sun's lower atmosphere

In which situations is the principle of cross-cutting relationship useful in determining relative age?

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.

What are potential sources of error in marta’s experiment