Help plz I'll ly for ever​

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

c. heat from the poles back down towards the equator.