To provide a governing framework if im correct but please add a little more information
It's kinda hard to explain but I found a reliable website
http://www.history.com/topics/mcculloch-v-maryland
Answer:
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welcome
Self pollination happens when the pollen is deposited on the same flower or another flower on the same plant, while cross pollination is the transfer of pollen from another plant on a different flower
I would say it would either be racism or discrimination.
Hope it helps.