What process did the plant perform to produce air nearly as good as "common air"?

Four types of motile cells in human body?

If two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotybes? oa) one is ii ob) one is ibi oc) both are bi od) nothing, this is impossible

What organ systems are working to you cool down after a workout?