Im pretty sure your answer is b.
A pure substance made up of only one type of atom is an element
Answer: SPORES are defined as haploid (1n) cells which develops into gametophytes.
Gametophytes inturn produce either haploid (1n) male or females GAMETES that can fuse to form diploid ZYGOTES.
This basically explains what goes on in Meiosis.
I would need to see what is labeled b, in order to help you.
