Mr. r married a healthy woman in his home country of italy and had three children, a boy with beta-thalassemia minor and two healthy girls. then, after the death of his wife, mr. r immigrated to the united states, where he married a woman who has beta-thalassemia major. both of her beta-chain genes are abnormal, but her disease was medically controlled with transfusions and chelation, a treatment to remove excess iron from the body. she has been looking into the possibility of a bone marrow transplant. why would a bone marrow transplant someone whose red blood cells had a genetic defect?

How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.