I think the answers are
Sporophyte generation: Both
Pollination: Both
Sporophyte contains male and female reproductive structures: Seed plants
Single fertilization: Both
Sperm cells transported by water to egg cells: Both
I think it’s D. H2, NaCI, CO
The aspect of his experimental process that is most important for obtaining reliable results is : Taking observations at precise intervals.
With this, Cameron will not messed up the duration data during each stage of germination.
hope this helps
Analytical balance is your answer