Compare the human digestive system and an assemble line in reverse

What are the four basic classes of organic molecules how do they differ structurally and functionally

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.

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer