Aman with type a blood whose mother was type o is married to a woman with type ab blood. what are the blood types of their children and in what proportion?

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

During binary fission, what events must occur before the cell splits into two new cells?