Which of the following scenarios can be classified as a positive feedback loop? 1.increase in blood pressure to reduce the heart rate
2.increase in red blood cell production due to low oxygen levels
3.sweating to cool down skin cells
4.increased platelet production to help blood clotting

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.