Acouple has six children. two have blood type a, one has blood type b, two have blood type ab, and one has blood type o. what are the genotypes of their parents?

So, you have a type A, which means one has A, you have a B, which means one has B

So right now, Parent A has a blood type of A, and Parent B has a blood type of B

Now a child has AB, which is a possibility figuring that A and B are options

Now that a child has O, which is only a possibility if both parents have O, the Genotype of your parents are AO and BO.

Hope this helped :)

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.

1) noble gases2) by increasing atomic number3) noble gases