Examples of bacteriophage

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Select the correct answer. tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?