If only a single member of a pair of chromosomes is present in a cell, it is a condition and is most likely a cell.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.