Afern is in the sporophyte phase of its life cycle. which of the following best explains what happens next in the fern’s life cycle? a. haploid spores are released to form zygotes, which grow into gametophytes. b. flagellated sperm swim from the sporangia to the eggs and fertilize them. c. sporangia form underneath the fronds, and haploid spores form in the sporangia. d. spores are released and grow into adult male and female plants.

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.