PLEAS HELP! Can anyone tell me how plants survived the ice age

POSSIBLE ANSWERS:

Plants shut down their reproductive processes for thousands of years.

Seeds that are adapted to warm climates will germinate in greater numbers.

Stems will become taller and thinner over time.

Plants that could withstand the cold would reproduce in greater numbers.

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Along what geographical feature are most of the oil producing regions located

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.