Answer:
It tells us the polarity of the water.
Because those are traces of life meaning that there was life living there once, that life wouldn't have been able to survive there with how Antarctica is now.
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Concordance rates between monozygotic twins vary in different studies, approximately 50%; whereas dizygotic twins was 17%. Some twin studies (Koskenvuo et al; Hoeffer et al) have found rates as low as 11.0%–13.8% among monozygotic twins, and 1.8%–4.1% among dizygotic twins.
1) divergent boundaries - where plates move away from each other.
2)convergent boundaries - where plates move toward each other and collide.
3)transform boundaries - when two plates grin past each other.
