In an experiment, there are two groups. which group is not changed in any way? variable control hypothesis experimental

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

Photosynthesis converts solar energy into what type of energy?

How do accessory pigments chlorophyll?