Which best describes the basic structure of a fatty acid

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

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.