The amount of light. He is testing the effects of light, which implies there will be different amounts of light tested to reach a conclusion.
Answer: mode of reproduction
Explanation: Phylum pteridophyte are vascular plants this means they are plants that possess xylem and phloem tissues. Phylum pteridophyte reproduce and disperse by spores. The dominant phase in pteridophyte is sporophyte.
Phylum bryophyte lack true roots and they are non-vascular plants (no xylem and phloem tissues). They reproduce via gamates, the dominant reproductive phase in bryophyte is gametophyte.
C. Jim only
This is because comparing contrasts and contradictions is an English term rather than a Scientific term.
B the corpus phase is the correct answer the last phase of the menstural cycle that you are missing is called <span>the follicular phase</span>