Which scientific theory explains that the universe originated from a small, densely packed space?

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 of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

What are the pros and cons of quadrat sampling?