What is bioremediation? name two examples of organisms used for this.

The bioremediations are a kind of microorganisms used to clean a polluted site because they act on and kill pollutants.
One kind is the Phytoremediation, which uses the plants to extract pollutants such as hydrocarbons and chlorinated substances.
Another kind is Mycoremediation which uses digestive enzymes of the fungus (Kind of unicellular microorganisms) to clean up pollutants such as pesticides and metals.

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4, two dominant and two recessive

Iam not sure but to me it with be a or dsorry if i was late! hope this ! : )if you really want me to find out the answer that is correct tell me and i will do more research but the a or d makes sense to me.