A. Mass extinction is the answer
Answer:
1
Explanation:
Mostly because it was the BIGGEST thing that really happend during said event. The others happend yes but not as majorly as number 1.
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.
Caverns most commonly form in limestone
food goes into the human digestive system through the mouth before then moving through the pharynx, then esophagus, then stomach,then intestines, rectum and anus.
