What is located where the nose and mouth come together?

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

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?