What does it mean that plants alternate generations during their reproductive cycles?
a. When a mature diploid plant dies, its offspring will be haploid and this pattern repeats generation after generation.
b. All plants have a unicellular generation followed by a multicellular generation.
c. A haploid multicellular gametophyte produces gametes that unite to form a spore, producing diploid multicellular sporophytes, and these generations alternate.
d. Sperm and egg are produced by a sporophyte; they unite to make a gametophyte that gives rise again to a sporophyte.