NEED ASAP. in a cross where someone whose blood is heterozygous type B and someone who is type AB. choose the child that is not possible

What are four key elements of the study of economics?

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them