Free point if you want it ​

Which of the following systems in absorbing oxygen and releases carbon dioxide

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

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.