How are the reproductive cycles of a fungus and a pteridophyte similar?

 Likewise in pteridophytes, species also produces haploid spores through haploid stage. In diploid stage the two spores fuse together to form a prothallus which is a diploid stage. Hence, the similarity in the reproductive cycle of fungus and a pteridophyte is that both organisms produce haploid spores and exhibit diploid and haploid stages.

Explanation:

because the light is a great source of energy for the plants to survive. (i hope this )

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: