Which idea did Ptolemys model use to explain why the planets appeared to move backward as they moved in thier orbits

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

Do you think the gene eef1 alpha1 supports cell theory? explain your response.

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called